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

Problem: if 5 a = 3125 , then the value of 5 ( a - 3 ) is :
25

Problem: a can do a piece of work in 80 days . he works at it for 10 days b alone finishes the remaining work in 42 days . in how much time will a and b working together , finish the work ?
30

Problem: exactly 3 sides of a certain 10 - sided die are red . what is the probability that kumar rolls the die 3 times and the die lands with a red side up for the first time on the third roll ?

0.147