If the average weight of 40 apples is 33 kg and that of 32 apples is 60 kg, then the average weight (in kg) of all the apples is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 45.
Average weight = Sum of weight of apples/Number of apples
According to the given question,
Sum of weights of 40 apples = 33 × 40 = 1320 kg
Sum of weights of 32 apples = 32 × 60 = 1920 kg
Average weight of all apples = (1320 + 1920)/(40 + 32)
⇒ 3240/72 = 45