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

Q: Problem: students at a school were on average 180 cm tall . the average female height was 170 cm , and the average male height was 182 cms . what was the ratio of men to women ?

A: 5 : 1
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Q: Problem: at a certain fruit stand , the price of each apple is 40 cents and the price of each orange is 60 cents . mary selects a total of 30 apples and oranges from the fruit stand , and the average ( arithmetic mean ) price of the 30 pieces of fruit is 56 cents . how many oranges must mary put back so that the average price of the pieces of fruit that she keeps is 52 cents ?

A: 1
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Q: Problem: if a 2 - b 2 = 10 and a * b = 5 , find a 4 + b 4 .

A:
150
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