Q: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Problem: there are 2 sections a and b in a class, consisting of 36 and 44 students respectively. if the average weight of section a is 40 kg and that of section b is 35 kg, find the average of the whole class ?
Options: a. 35.29 kg, b. 37.25 kg, c. 42.45 kg, d. 55.12 kg, e. 29.78 kg
A:
b