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

Problem: a train 200 m long can cross an electric pole in 5 sec and then find the speed of the train ?
144

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 ?
400

Problem: if a number n is chosen at random from the set of two - digit integers whose digits are both prime numbers , what is the probability r that n is divisible by 3 ?

5 / 16