Average Practice Test 3

Question : 2 of 40

Marks: +1, -0

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 these two books?

Rs. 12, Rs. 14
Rs. 10, Rs. 16
Rs. 8, Rs. 12
Rs. 5, Rs. 7.50

Validate

Solution:

Let the price of remaining two books be Rs. x and Rs.

{8x}/ 5

Now,

x+{8x}/5=10×12-8×11.75

=120-94

⇒{13x}/5=26

⇒x=10

and

{8x}/5=16

Hence, price of remaining two books are Rs. 10 and Rs. 16

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