I need help with the following problem: Chad, an assembly line inspector, must p

Question

I need help with the following problem:
Chad, an assembly line inspector, must perform three tests ina certain order on a manufactured part. There are ten testsfrom which to choose. How many ways can he perform forudifferent tests? I am having trouble trying to figure out how to calculate theanswer. I need help with the following problem:
Chad, an assembly line inspector, must perform three tests ina certain order on a manufactured part. There are ten testsfrom which to choose. How many ways can he perform forudifferent tests? I am having trouble trying to figure out how to calculate theanswer.

Explanation / Answer

There are 10P4 = 5040 ways to permute agroup of 4 tests from a population of 10.

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