7-26. Let X be distributed as b(X; 20, 0.3). Use the normal distribution to find the approximate...

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7-26. Let X be distributed as b(X; 20, 0.3). Use the normal distribution to find the approximate probabilities:

(a) P(X ≤ 5)

(b) P(X ≥ 10)

(c) P(3 ≤ X ≤ 7)

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