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38% of people in the united states have type o+blood. you randomly select 50 people in the united states and record their blood type. a. what is the probability that exactly 20 have type o+blood? b. find the mean and standard deviation for this probability distribution. c. if you only select 8 people, what is the probability that at least one has type o+blood?
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38% of people in the united states have type o+blood. you randomly select 50 people in the united st...
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