Question

A man buys a few number of books at RS 72 each and a few number of pens at RS 25 each . If he buys 11 articles and pays RS 510 altogether,find the number of each article bought by him .

Answer 1

So we can subtract the cost of books and pens at first...

that is 72+25=97

510-97=413

413/11=approximately 37 each

Answer 2

Given :

A man buys a few number of books at RS 72 each and a few number of pens at RS 25 each .

To Find :

If he buys 11 articles and pays RS 510 altogether,find the number of each article bought by him .

Solution:

Total no. of article = 11

Let x be the no. of books bought for RS 72 each

So, No. of pens bought for RS 25 each = 11-x

Cost of x books = 72x

Cost (11-x) pens = 25(11-x)

He buys 11 articles and pays RS 510 altogether

So,72x+25(11-x)=510

72x+275-25x=510

47x=510-275

$x=\frac{510-275}{47}$

x=5

So,No. of pens bought for RS 25 each = 11-x=11-5=6

Hence 6 pens and 5 books were bought by him.