Question

When testing for current in a cable with nine color-coded wires, the author used a meter...

When testing for current in a cable with nine color-coded wires, the author used a meter to test five wires at a time. how many different tests are required for every possible pairing of five wires?
Math   Statistics-And-Probability   
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Answer #1

Answer:

Given that:

When testing for current in a cable with nine color-coded wires, the author used a meter to test five wires at a time.

Number of different wires = 9

Number of wires tested at a time = 5

This is the combination problem .

Therefore the number of possible different tests required for every possible pairing of two wires =

Number of possible pairings =

Number of possible pairings = 126

There are 126 possible pairings.

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