The average price of 10 books is rs 12

Asked by admin @ 13/08/2021 in Math viewed by 294 People

The average price of 10 books is Rs.12 while the average price of 8 of these books is Rs.11.75. Of the remaining two books, if the price of one book is 60% more than the price of the other, what is the price of each of these two books?

A.Rs. 5, Rs.7.50
B.Rs. 8, Rs. 12
C.Rs. 16, Rs. 10
D.Rs. 12, Rs. 14

Answered by admin @ 13/08/2021

Answer:

10 AND 16

Step-by-step explanation:

Total pice of the two books = Rs. [(12 x 10) - (11.75 x 8)]

= Rs. (120 - 94) = Rs. 26.

let the price of one book be Rs. x

Then, the price of other book = Rs. (x + 60% of x) = Rs.(x+(3/5)x) = Rs. (8/5)x

So, x+(8/5)x =26 <=> x =10

The prices of the two books are Rs. 10 and Rs. 16

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