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Probability of Finding at Least Five Left-Handers Out of 30

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The probability that an individual is left-handed is 0.1. In a class of 30 students, what is the probability of finding at least five left-handers?

Construct a binomial distribution.
Find the mean, variance and standard deviation of the distribution.

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The solution shows how to find the probability of finding at least five left-handers out of 30 students. The solution is presented in an attached Word and PDF file.

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The sample size n = 30 because there are 30 students in the class.
p = 0.1 for the probability that an individual is left-handed.
Then the binomial distribution is n = 30, p ...

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