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Need help with a math probability question!
11.7% of the population is 65 or older. Find the probability that the following number of persons selected at random from 20 people are 65 or older.
1) Probability that all are 65 or older? 2) Probability that at most 2 are 65 or older? |
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This is a binomial distribution with n = 20 and p = 0.117 For all being older... For 2 being older... Can you work these out? |
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