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

Ex Input:
Problem: the standard deviation of a normal distribution of data is 2 , and 3 standard deviations below the mean is greater than 48 . what is a possible value for the mean of the distribution ?

Ex Output:
55


Ex Input:
Problem: a train running at the speed of 70 km / hr crosses a pole in 9 sec . what is the length of the train ?

Ex Output:
175 m


Ex Input:
Problem: peter invested a certain sum of money in a simple interest bond whose value grew to $ 300 at the end of 3 years and to $ 400 at the end of another 5 years . what was the rate of interest in which he invested his sum ?

Ex Output:

8.33