TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: the average weight of a , b and c is 60 kg . if the average weight of a and b be 70 kg and that of b and c be 50 kg , then the weight of b is :

SOLUTION: 60 kg

PROBLEM: Problem: how many numbers between 200 and 600 are divisible by 4 , 5 and 6 ?

SOLUTION: 6

PROBLEM: Problem: there are 7 pairs of socks and 2 socks are worn from that such that the pair of socks worn are not of the same pair . what is the number of pair that can be formed .

SOLUTION:
4