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Introduction to Permutation

If we have 5 ...

Question

If we have $5$ different bicycles and we want to arrange them all in a line. How many different ways are there to arrange them?

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Solution

We have $5$ choices for the first bicycle, $4$ choices for the second, and so on.

The number of arrangements is $5 \times 4 \times 3 \times 2 \times 1 = 5! = 120$

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