Thank you all. On 6/24/13, Kartik Sawhney <[email protected]> wrote: > Hi, > > Rather than trying to understand the terminology, one can simply > understand the implication and complete the problem easily. For > instance, it isn't vital to understand the word `union`, and simply > understanding what it implies (either....or....both) is sufficient. So > basically, one can adopt an approach similar to the one in set theory, > without delving into its details as such. This way, the problems can > be approached a lot more efficiently in my view. > > Best, > > On 6/24/13, Vedprakash <[email protected]> wrote: >> Yes, the set theory is easy but most of us have gone through mathes up to >> tenth level. >> That is why, the terms like a union b, or complementary etc., are new to >> such aspirants. >> ----- Original Message ----- >> From: "Kartik Sawhney" <[email protected]> >> To: <[email protected]> >> Sent: Monday, June 24, 2013 11:09 AM >> Subject: Re: [AI] help me in understanding the method for solving such >> type >> >> of mathematical problems >> >> >>> Hi, >>> >>> The solution as suggested by Mr. Sharma to 1B, is in fact, correct. >>> Accidently, Mr. Kanchwala has taken 150000 as 15000, resulting in the >>> anomaly. >>> >>> Further, the solution to the second question as suggested is very >>> complecated. An easy way of approaching this is by employing set >>> theory. >>> >>> Let h be the set of students who failed in Hindi, and E be the set of >>> students who failed in English >>> Let the total No. of students in the class=100 >>> Now, we have: >>> No. of elements in H=35 >>> No. of elements in E=45 >>> Further, No. of elements in E intersection H=20 >>> Further, we know: >>> E u H=No. of elements in e+No. of elements in H-No. of elements in e >>> intersection h >>> Where u is union >>> (You can learn this formula for this type of problems, it will prove >>> handy) >>> Therefore, in this case: >>> e u h=35+45-20=60 >>> Now, 60 students failed in either English or Hindi or both. >>> Therefore, students who did not fail in either of the subjects (rather >>> who passed in both the subjects)=100-60=40 >>> >>> Best, >>> >>> >>> On 6/23/13, Zujar Shabbir Kanchwala <[email protected]> wrote: >>>> Pardon me for addressing this post to the list. >>>> >>>> I see that the solution suggested for question # 1b by Mr. S P Sharma >>>> isn't >>>> correct and it needs be known to fellow list members so that they can >>>> correct themselves. If one multiplies 15000 by 95% twice to get the >>>> population 2 years back then the answer is 135375. This answer is >>>> incorrect, >>>> the correct answer is 13605. >>>> >>>> Here's the explanation: >>>> >>>> Let x be the population 2 years back. >>>> >>>> 1 year back the population would be: >>>> x + 0.05x >>>> =1.05x >>>> >>>> Current year the population would be: >>>> 1.05x + (0.05 * 1.05)x >>>> =1.05x + 0.0525x >>>> =1.1025x >>>> >>>> Given that current year the population is 15000. >>>> So, 1.1025x = 15000 >>>> Therefore, x = 15000 / 1.1025 >>>> =13605.44 rounded off to 13605. >>>> >>>> Note that 5% of 100 is 5 but 5% of 95 is 4.75 not 5. So, if the >>>> population >>>> 1 >>>> year back is 95 then current year it would be 95+4.75=99.75 and not >>>> 100. >>>> >>>> The compound interest method suggested by Mr. Vedprakash fits in best >>>> for >>>> such problems, it's shorter than the above method. I mentioned the >>>> above >>>> method to explain how it works. >>>> >>>> Hope this is clear... >>>> >>>> Best Regards, >>>> Zujar. >>>> >>>> An optimist laughs to forget and a pessimist forgets to laugh! >>>> >>>> -----Original Message----- >>>> From: AccessIndia [mailto:[email protected]] On >>>> Behalf >>>> Of Vedprakash >>>> Sent: Sunday, June 23, 2013 11:25 AM >>>> To: [email protected] >>>> Subject: Re: [AI] help me in understanding the method for solving such >>>> type >>>> of mathematical problems >>>> >>>> Sorry for a wrong answer of the second question. sending the same >>>> again. >>>> 2. In a class 35% students failed in hindi, 45% failed in english >>>> subjects >>>> respectively. 20% students failed in both subjects, find out the >>>> percentage >>>> of the students who passed in both subjects. >>>> Total numbers of the students: = 100 >>>> Failed in Hindi = 35% >>>> Passed in Hindi: = 100 minus 35 = 65. >>>> Failed in English: = 45 >>>> passed in English = 100 minus 45 = 55. >>>> failed in both = 20. >>>> Passed in either Hindi or English = 100 minus 20 = 80. >>>> Passed in Both = >>>> A. Passed in either Hindi or English minus Passed in Hindi = 80 minus >>>> 65 >>>> >>>> = >>>> 15 Plus B. Passed in either Hindi or English minus Passed in English >>>> =80 minus 55 = 25 >>>> = A plus B >>>> =15 plus25 >>>> =40 Answer. >>>> >>>> >>>> ----- Original Message ----- >>>> From: "Mohib Anwar Rafel" <[email protected]> >>>> To: "accessindia" <[email protected]> >>>> Sent: Saturday, June 22, 2013 9:34 PM >>>> Subject: [AI] help me in understanding the method for solving such type >>>> of >>>> mathematical problems >>>> >>>> >>>>> Hi friends I am unable to understand the way to solve the following >>>>> problems, even I couldn't understand it by reading R. S. Agarwal book. >>>>> please guide me. >>>>> >>>>> 1. If the population of a town is 1,50,000 at present, it is >>>>> increasing at the rate of 5% per annum, >>>>> (a) what will be the population of the town after 2 years? >>>>> (b) what was the population of the town before 2 years? >>>>> >>>>> 2. In a class 35% students failed in hindi, 45% failed in english >>>>> subjects respectively. 20% students failed in both subjects, find out >>>>> the percentage of the students who passed in both subjects. >>>>> >>>>> -- >>>>> Mohib Anwar Rafel >>>>> M.Phil/Masters in International Law, Center for International Legal >>>>> Studies JNU. >>>>> Pursuing Masters of Law, at University of Delhi >>>>> >>>>> Phone: 09811767506, >>>>> 01127666896 >>>>> >>>>> Register at the dedicated AccessIndia list for discussing >>>>> accessibility of mobile phones / Tabs on: >>>>> http://mail.accessindia.org.in/mailman/listinfo/mobile.accessindia_acc >>>>> essindia.org.in >>>>> >>>>> >>>>> Search for old postings at: >>>>> http://www.mail-archive.com/[email protected]/ >>>>> >>>>> To unsubscribe send a message to >>>>> [email protected] >>>>> with the subject unsubscribe. >>>>> >>>>> To change your subscription to digest mode or make any other changes, >>>>> please visit the list home page at >>>>> http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org >>>>> .in >>>>> >>>>> >>>>> Disclaimer: >>>>> 1. Contents of the mails, factual, or otherwise, reflect the thinking >>>>> of the person sending the mail and AI in no way relates itself to its >>>>> veracity; >>>>> >>>>> 2. AI cannot be held liable for any commission/omission based on the >>>>> mails sent through this mailing list.. >>>> >>>> >>>> Register at the dedicated AccessIndia list for discussing accessibility >>>> of >>>> mobile phones / Tabs on: >>>> http://mail.accessindia.org.in/mailman/listinfo/mobile.accessindia_accessind >>>> ia.org.in >>>> >>>> >>>> Search for old postings at: >>>> http://www.mail-archive.com/[email protected]/ >>>> >>>> To unsubscribe send a message to >>>> [email protected] >>>> with the subject unsubscribe. >>>> >>>> To change your subscription to digest mode or make any other changes, >>>> please >>>> visit the list home page at >>>> http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in >>>> >>>> >>>> Disclaimer: >>>> 1. Contents of the mails, factual, or otherwise, reflect the thinking >>>> of >>>> the >>>> person sending the mail and AI in no way relates itself to its >>>> veracity; >>>> >>>> 2. AI cannot be held liable for any commission/omission based on the >>>> mails >>>> sent through this mailing list.. >>>> >>>> >>>> Register at the dedicated AccessIndia list for discussing accessibility >>>> of >>>> mobile phones / Tabs on: >>>> http://mail.accessindia.org.in/mailman/listinfo/mobile.accessindia_accessindia.org.in >>>> >>>> >>>> Search for old postings at: >>>> http://www.mail-archive.com/[email protected]/ >>>> >>>> To unsubscribe send a message to >>>> [email protected] >>>> with the subject unsubscribe. >>>> >>>> To change your subscription to digest mode or make any other changes, >>>> please >>>> visit the list home page at >>>> http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in >>>> >>>> >>>> Disclaimer: >>>> 1. Contents of the mails, factual, or otherwise, reflect the thinking >>>> of >>>> >>>> the >>>> person sending the mail and AI in no way relates itself to its >>>> veracity; >>>> >>>> 2. AI cannot be held liable for any commission/omission based on the >>>> mails >>>> sent through this mailing list.. >>>> >>> >>> >>> -- >>> -Kartik Sawhney, >>> Mob.: 91-9560953728 >>> Landline: 91-11-29811529 >>> E-mail ID: [email protected] (all personal E-mails); >>> [email protected] (all academic E-mails) >>> Skype: kartik.sawhney22 >>> >>> Register at the dedicated AccessIndia list for discussing accessibility >>> of >>> >>> mobile phones / Tabs on: >>> http://mail.accessindia.org.in/mailman/listinfo/mobile.accessindia_accessindia.org.in >>> >>> >>> Search for old postings at: >>> http://www.mail-archive.com/[email protected]/ >>> >>> To unsubscribe send a message to >>> [email protected] >>> with the subject unsubscribe. >>> >>> To change your subscription to digest mode or make any other changes, >>> please visit the list home page at >>> http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in >>> >>> >>> Disclaimer: >>> 1. Contents of the mails, factual, or otherwise, reflect the thinking of >>> the person sending the mail and AI in no way relates itself to its >>> veracity; >>> >>> 2. AI cannot be held liable for any commission/omission based on the >>> mails >>> >>> sent through this mailing list.. >> >> >> Register at the dedicated AccessIndia list for discussing accessibility >> of >> mobile phones / Tabs on: >> http://mail.accessindia.org.in/mailman/listinfo/mobile.accessindia_accessindia.org.in >> >> >> Search for old postings at: >> http://www.mail-archive.com/[email protected]/ >> >> To unsubscribe send a message to >> [email protected] >> with the subject unsubscribe. >> >> To change your subscription to digest mode or make any other changes, >> please >> visit the list home page at >> http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in >> >> >> Disclaimer: >> 1. Contents of the mails, factual, or otherwise, reflect the thinking of >> the >> person sending the mail and AI in no way relates itself to its veracity; >> >> 2. AI cannot be held liable for any commission/omission based on the >> mails >> sent through this mailing list.. >> > > > -- > -Kartik Sawhney, > Mob.: 91-9560953728 > Landline: 91-11-29811529 > E-mail ID: [email protected] (all personal E-mails); > [email protected] (all academic E-mails) > Skype: kartik.sawhney22 > > Register at the dedicated AccessIndia list for discussing accessibility of > mobile phones / Tabs on: > http://mail.accessindia.org.in/mailman/listinfo/mobile.accessindia_accessindia.org.in > > > Search for old postings at: > http://www.mail-archive.com/[email protected]/ > > To unsubscribe send a message to > [email protected] > with the subject unsubscribe. > > To change your subscription to digest mode or make any other changes, please > visit the list home page at > http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in > > > Disclaimer: > 1. Contents of the mails, factual, or otherwise, reflect the thinking of the > person sending the mail and AI in no way relates itself to its veracity; > > 2. AI cannot be held liable for any commission/omission based on the mails > sent through this mailing list.. >
-- Mohib Anwar Rafel M.Phil/Masters in International Law, Center for International Legal Studies JNU. Pursuing Masters of Law, at University of Delhi Phone: 09811767506, 01127666896 Register at the dedicated AccessIndia list for discussing accessibility of mobile phones / Tabs on: http://mail.accessindia.org.in/mailman/listinfo/mobile.accessindia_accessindia.org.in Search for old postings at: http://www.mail-archive.com/[email protected]/ To unsubscribe send a message to [email protected] with the subject unsubscribe. To change your subscription to digest mode or make any other changes, please visit the list home page at http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in Disclaimer: 1. Contents of the mails, factual, or otherwise, reflect the thinking of the person sending the mail and AI in no way relates itself to its veracity; 2. AI cannot be held liable for any commission/omission based on the mails sent through this mailing list..
