The taste test for PTC (phenylthiocarbamide) is a favorite exercise for every human genetics class. It has been established that a single gene determines the characteristic, and that 70% of Americans are "tasters," while 30% are "nontasters." Suppose that 20 Americans randomly chosen and are tested for PTC. (Round your answers to three decimal places.) LUSE SALT

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The taste test for PTC (phenylthiocarbamide) is a favorite exercise for every human genetics class. It has been established that a single gene determines the characteristic, and that 70% of Americans are "tasters," while 30% are "nontasters." Suppose that 20 Americans are
randomly chosen and are tested for PTC. (Round your answers to three decimal places.)
USE SALT
(a) What is the probability that 14 or more are "tasters"?
(b) What is the probability that 11 or fewer are "tasters"?
Transcribed Image Text:The taste test for PTC (phenylthiocarbamide) is a favorite exercise for every human genetics class. It has been established that a single gene determines the characteristic, and that 70% of Americans are "tasters," while 30% are "nontasters." Suppose that 20 Americans are randomly chosen and are tested for PTC. (Round your answers to three decimal places.) USE SALT (a) What is the probability that 14 or more are "tasters"? (b) What is the probability that 11 or fewer are "tasters"?
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