0
$\begingroup$

The question is:

Seats for Math,Physics and biology in a school are in ratio 5:7:8. There is a proposal to increase these seats by 40%,50% and 75% respectively.What will be ratio of increased seats?

Apparently I am currently increasing 5 by 40% and 7 by 50% and 8 by 75% . But this is not giving the correct answer. Any suggestions what should be done here ??

$\endgroup$
0
$\begingroup$

Let number of seats be $5x,7x$ and $8x$. Number of seats after increment =$7x,21x/2,14x$. Therefore the new ratio is $14:21:28=2:3:4$.isn't this the answer?

$\endgroup$
  • $\begingroup$ Yes that's the answer. I got till 7x,21x/2,14x but how did you get 14:21:28 ? $\endgroup$ – Rajeshwar Jul 2 '12 at 10:21
  • 1
    $\begingroup$ multiply each by 2, since multiplication doesn't change the ratio and then divide each by 7 since division doesn't change the ratio either. $\endgroup$ – Aang Jul 2 '12 at 10:23
0
$\begingroup$

To increase, first find the sum of ratio, 5 by 20 times 40 is 10 continue you'll get 10:17.5:30

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.