The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: the average weight of a group of boys is 30 kg . after a boy of weight 45 kg joins the group , the average weight of the group goes up by 1 kg . find the number of boys in the group originally ?
[EX A]: 14

[EX Q]: Problem: if one - third of one - fourth of a number is 18 , then 3 - tenth of that number is : a . 35
[EX A]: 64.8

[EX Q]: Problem: at 3 : 40 , the hour hand and the minute hand of a clock form an angle of
[EX A]:
130 °