Question

In a class of 50 students, 40% are girls. The average weight of the boys is 62 kg and that of the girls is 58 kg. What is the average weight (in kg) of the whole class?

• A. 60.4
• B. 60.2
• C. 60.8
• D. 60.6

Answer 1

Answer:

A. 60.4

Number of girls = 50 × 40/100 = 20 Number of boys = 50 - 20 = 30 Total weight of boys = 30 × 62 = 1860 Total weight of girls = 20 × 58 = 1160 Total weight of 50 students = 1860 + 1160 = 3020 Average = 3020/50 = 60.4