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In the United States, 44% of the population has type O blood. Suppose a random sample of 12 persons is taken. Find the probability that

In the United States, 44% of the population has type O blood. Suppose a random sample of 12 persons is taken. Find the probability that 6 of the persons will have type O blood (and 6 will not)

(a) using the binomial distribution formula.

(b) using the normal approximation.

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