127 Sickle-cell anemia. Eight percent of the African-American population is known to carry the trait for sickle-cell
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127 Sickle-cell anemia. Eight percent of the African-American population is known to carry the trait for sickle-cell anemia (Sickle Cell-Information Center, Atlanta, GA). If 1,000 African-Americans are sampled at random, what is the approximate probability that
a. More than 175 carry the trait?
b. Fewer than 140 carry the trait?
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