TASK DEFINITION: The task is to generate the correct answer for a given math problem.
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 )

SOLUTION: 5 / 5

PROBLEM: Problem: if | 5 x - 20 | = 100 , then find the sum of the values of x ?

SOLUTION: 8

PROBLEM: Problem: a class of 20 students took a science test . 10 students had an average ( arithmetic mean ) score of 80 . the other students had an average score of 60 . what is the average score of the whole class ?

SOLUTION:
70