The task is to generate the correct answer for a given math problem.
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Question: Problem: in a village of 2,500 people , 800 people are over 70 years old and 850 people are female . it is known that 40 percent of the females are younger than 70 years old . if no one in the village is 70 years old , what is the probability that a person chosen at random is either a male or younger than 70 years old ?

Answer: 199 / 250


Question: Problem: if 5 % more is gained by selling an article for rs . 360 than by selling it for rs . 340 , the cost of the article is ?

Answer: 400


Question: Problem: the sum of the even numbers between 1 and n is 85 * 86 , where n is an odd number , then n = ?

Answer:
171