Question 944366: According to a recent survey, 23% of Canadian taxpayers do not plan to contribute to their registered retirement savings plans (RRSPs) for the current taxation year. If 30 Canadian taxpayers are randomly selected, find the probability that between 18 and 22 will contribute to their RRSPs for the current taxation year.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! According to a recent survey, 23% of Canadian taxpayers do not plan to contribute to their registered retirement savings plans (RRSPs) for the current taxation year. If 30 Canadian taxpayers are randomly selected, find the probability that between 18 and 22 will contribute to their RRSPs for the current taxation year.
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Binomial Problem with n = 30 and p(contribute) = 0.77
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P(18 <= x <= 22) = binomcdf(30,0.77,22)-binomcdf(30,0.77,17) = 0.3727
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Cheers,
Stan H.
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