Task: Question Answering
Input (English): Problem: the average weight of 20 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. find the average weights of all the boys in the class.
Options: a. 48.79286, b. 42.25, c. 50.87364, d. 51.25, e. 52.25474
Output (English): a