Question
Asked Dec 3, 2019
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When testing for current in a cable with ten ​color-coded wires, the author used a meter to test two wires at a time. How many different tests are required for every possible pairing of five wires?

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Expert Answer

Step 1

Combination Rule:

The arrangement of r objects from n different objects is given by:

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п! 5" r!(п-r)!

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Step 2

Calculating the possible different comparisons are given below:

It is given ten color-coded wires. The author used a met...

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Numberpossible differnet compari son (10C) 10! 2(10-2)! 10! 28)! 3,628,800 80,640 = 45

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