Multiple choice

There are two sections A and B of a class, consisting of 33 and 47 students, respectively. If the average weight of section A is 42 kg and that of section B is 32 kg, then what will be the average weight of the whole class?

  1. 0.9 kg

  2. 5920 kg

  3. 74 kg

  4. 36.125 kg

  5. 37 kg

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total weight of (33 + 47) students = (33 x 42 + 47 x 32) kg = 2890 kg Therefore, thev average weight of the whole class = (2890/80) = 36.125 kg.