The average weight of 50 balls is 5 g. When the weight of a bag is also included, the average increases by 0.05 g. What is the weight of the bag?
A
5.05
B
6.05
C
7.05
D
7.55
Correct Option:
D
Explanation
The total weight of the 50 balls is 50 × 5 = 250 g. The total weight of 50 balls and the bag is 51 × 5.05 = 257.55 g. Therefore, the bag weighs 7.55 g.
