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30-07-2016
Mathematics

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Assume that 10 people, including the husband and wife pair, apply for 4 sales positions. People are hired at random.. . What is the probability that one is hired and one is not?

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HomertheGenius HomertheGenius

02-08-2016

Possible outcomes: 10C4 = 210 ( combinations - we choose 4 of 10 people )
Favorable outcomes: ( 2C1 ) · ( 8C3 ) = 2 · 56 = 112
Probability : 112 / 210 = 0.5333 ( or 53.33 % ).

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