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### Question

There are 8 trains between two stations A and B. In how many ways can a student go from A to B and return by a different train?

**A**

56.

**B**

61.

**C**

54.

**D**

57.

**Soln.**

**Ans: a**

The upward journey is possible in 8 ways, and the downward in 7 ways. So the outcomes are 8 × 7 = 56.