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

Problem: jack and jill are marathon runners . jack can finish a marathon ( 42 km ) in 7 hours and jill can run a marathon in 4.2 hours . what is the ratio of their average running speed ? ( jack : jill )
5 / 5

Problem: the set s consists of 5 numbers : { 1 , 2,3 , 4,5 } . if all possible subsets including the null set are created and one subset is chosen at random , what is the probability that the subset has 3 or 4 as its largest number ?
3 / 8

Problem: find the principle on a certain sum of money at 5 % per annum for 2 years if the amount being rs . 1120 ?
1018