It is known that 20 of the children in a school are first, Ask an Expert

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It is known that 20% of the children in a school are first graders. If the school is sending a group of 11 randomly selected children to camp,

a) what is the probability that less than 4 of the campers are first graders in this binomial distribution?
b) what is the mean and variance of the number of first graders chosen from this binomial distribution?

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Category:- Statistics and Probability
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