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# 20 of the 80 employees at a certain organization are doctors. If two

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Re: 20 of the 80 employees at a certain organization are doctors. If two [#permalink]
We don't need exact, just approximate
20 of the 80 employees at a certain organization are doctors
3/4 are not doctors

two employees...probability that neither employee selected is a doctor
3/4·59/79
59/79 is basically 3/4
3/4·3/4=9/16

16·6=96 which is basically 100
9·6/16·6=54/96
96 is a bit below 100, so the answer should be a bit above 54/100

C
Re: 20 of the 80 employees at a certain organization are doctors. If two [#permalink]
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