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When X is a binomial random variable, the mean of the probability distribution = np. In a classroom with 20 boys and 47 girls. If
When X is a binomial random variable, the mean of the probability distribution = np. In a classroom with 20 boys and 47 girls. If names are drawn from a bag and the gender of each student is recorded (then the name mixed back into the bag before the next trial). Find the mean number of times a girls name would be expected to be drawn from the bag if 31 names were drawn from the bag
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