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OpenStudy (anonymous):
Five marbles are randomly selected with replacement. The probability that a black marble is chosen is 15%. What is the probability that at least 2 marbles are black?
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OpenStudy (kropot72):
This can be found from the binomial distribution. Use the binomial distribution to find the probabilities of zero marbles and one marble in a sample of 5 are black. Add these 2 values of probability and subtract the sum from one.\[P(at\ least\ 2\ black)=1-[P(0)+P(1)]\]
OpenStudy (anonymous):
Thank you!
OpenStudy (kropot72):
You're welcome :)
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