If there are 16 people in a hospital and 4 need an xray. What is the...
If there are 16 people in a hospital and 4 need an xray.
What is the probabilty that if you choose 2 people randomly, exactly one will need an xray?
Homework Answers
If there are 16 people in a hospital and 4 need an xray.
We want to find, the probabilty that if you choose 2 people randomly, exactly one will need an xray
That means, we have to select 1 people who need x-ray (i.e from 4 people) and one people who don't need x-ray (i.e. from 16-4 = 12).
And total 2 people can be selected from 16 people.
Therefore, Probability that if you choose 2 people randomly, exactly one will need and x-ray is,
Hence, required probability is 0.4
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If there are 16 people in a hospital and 4 need an xray.
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