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60% of all Americans live in cities with population greater than 100,000 people. If 40 Americans are randomly selected, find the probability that a. Exactly

60% of all Americans live in cities with population greater than 100,000 people. If 40 Americans are randomly selected, find the probability that

a. Exactly 25 of them live in cities with population greater than 100,000 people.

b. At most 23 of them live in cities with population greater than 100,000 people.

c. At least 23 of them live in cities with population greater than 100,000 people.

d. Between 22 and 26 (including 22 and 26) of them live in cities with population greater than 100,000 people.

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