How many ways can you arrange 10 different items?
Hint
10!
Answer
3,628,800
Your mom has framed photos of you from 1st grade to 7th. She is going to hang them in the hall in a long row. How many ways can she display them?
7!
5040
If she hangs these randomly, what is the probability that they will be in chronological order from left to right or right to left.
there are two ways to do this
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