You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Question: If a Bus is travelling at a speed of 45 kmph, crosses a pole in 1 sec, then the length of train is?

Option A: 12 m

Option B: 12.3 m

Option C: 12.5 m

Option D: 12.8 m

Option E: 13 m
Option C

Question: Twelve participants are participating in a competition. In how many ways can the first three prizes be won?

Option A: 1320

Option B: 680

Option C: 820

Option D: 720

Option E: 620
Option A

Question: There are 10 women and 15 men in an office. In how many ways a team of a man and a woman can be selected?

Option A: 55

Option B: 25

Option C: 150

Option D: 28

Option E: None of these
Option C