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There are 20 runners in a race for 1st, 2nd, 3rd, and 4th place. How many different arrangements can be made?​
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There are 20 runners in a race for 1st, 2nd, 3rd, and 4th place. How many different arrangements can be made?​

There are 20 runners in a race for 1st, 2nd, 3rd, and 4th place. How many different-example-1
User Prity
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Answer: 160

Explanation:

User Knirirr
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