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

Q: Problem: a train running at the speed of 40 km / hr crosses a pole in 9 seconds . what is the length of the train ?

A: 100 meter
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Q: Problem: the probability is 1 / 2 that a certain coin turns up heads on any given toss . if the coin is tossed 6 times , what is the probability that the coin turns up tails on at least one of the tosses ?

A: 63 / 64
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Q: Problem: last year a certain bond price with a face value of 5000 yielded 10 % of its face value in interest . if that interest was approx 6.5 of the bond ' s selling price approx what was the bond ' s selling price ?

A:
7692
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