instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: if mn ≠ 0 and 25 percent of n equals 37 1 / 2 percent of m , what is the value of 12 n / m ?
answer:
18


question:
Problem: what is the probability of getting a queen or spade from a set of cards ?
answer:
4 / 13


question:
Problem: the first flight out of phoenix airport had a late departure . if the next 3 flights departed on - time , how many subsequent flights need to depart from phoenix on - time , for the airport ' s on - time departure rate to be higher than 40 % ?
answer:

2