### Solution(By Apex Team)

Total cost of 10 books = Rs. 120 Total cost of 8 books = Rs. 94 ⇒ The cost of 2 books = Rs. 26 Let the price of each book be x and y. ⇒ x + y = 26 – – – – – – (1) $\left(\Large\frac{160}{100}\right) x+y=26$ On Solving for y, we get y = 10 Now, Substituting y = 10 in (1) we get, x + 10 = 26 x = 16 So the price of each book is Rs. 16 and Rs. 10 respectively.

A. 20
B. 21
C. 28
D. 32

A. 18
B. 20
C. 24
D. 30

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years