Chetan bought 52 books for Rs 1125 from one shop and 48 books for Rs 925 from another. What is the average price (in Rs) he paid per book ?

Correct option is D

Given:

First purchase: 52 books for ₹1125

Second purchase: 48 books for ₹925

Formula Used:

$$\text{Average} = \frac{\text{Sum of all observations}}{\text{Number of observations}}$$​​

Solution:
Total cost = ₹1125 (first purchase) + ₹925 (second purchase)
Total cost = ₹1125 + ₹925 = ₹2050

Total number of books = 52 (first purchase) + 48 (second purchase)
Total number of books = 52 + 48 = 100

Average price per book = $$\frac {2050}{100}$$ = 20.5