What is the probability that there is no matching pair

Reference no: EM13122348

Probability - drawer with socks
1) A drawer contains n=5 different and distinguishable pairs of socks (a total of 10 socks). If a person randomly selects 4 socks, what is
the probability that there is no matching pair in the sample?

2) A drawer contains n different and distinguishable pairs of socks (a total of 2n socks). A person randomly selects 2r of the socks, where
2r > n. In terms of n and r, what is the probability that there is no matching pair in the sample?

Reference no: EM13122348

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