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skad [1K]
1 year ago
11

You are choosing 4 of your 7 trophies and arranging them in a row on a shelfIn how many different ways can you choose and arrang

e the trophies?A. 840B. 28C. 24D. 5040
Mathematics
1 answer:
erastova [34]1 year ago
6 0

The formula to find how many different ways are there to choose a subgroup of r things from a group of n things is

\frac{n!}{(n-r)!}

Here, you have 7 trophies and you want to choose 4 of them, so you have

\frac{7!}{(7-4)!}\text{ = }\frac{5040}{6}=840

So there are 840 ways to choose your 4 trophies out of the 7 you have.

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