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

Input: Consider Input: Problem: one fast typist type some matter in 4 hrs and another slow typist type the same matter in 6 hrs . if both do combine in how much time they will take to finish .

Output: 2 hr 24 mins


Input: Consider Input: Problem: set a { 3 , 3,3 , 4,5 , 5,5 } has a standard deviation of 1 . what will the standard deviation be if every number in the set is multiplied by 8 ?

Output: d ) 8


Input: Consider Input: Problem: what is the probability of getting a queen or spade from a set of cards ?


Output: 4 / 13