Refer to the following information on full-term births in the United States over

Question

Refer to the following information on full-term births in the United States over a given period of time.

Use this information to estimate the probabilities of the following events.

(a) A randomly selected pregnant woman who reaches full term delivers twins. (Give the answer to three significant figures.)

(b) A randomly selected pregnant woman who reaches full term delivers quadruplets. (Give the answer to three significant figures.)


(c) A randomly selected pregnant woman who reaches full term gives birth to more than a single child. (Give the answer to three significant figures.)

Explanation / Answer

a) P(Deliver twins) = 200000 / (31700000 + 200000 + 5000 + 300) = 0.006

b) P(Deliver quadruplets) = 300 / (31700000 + 200000 + 5000 + 300) = 0.000

c) P(More than a single child) = 1 - P(Single child) = 1 - 31700000 / (31700000 + 200000 + 5000 + 300) = 0.006

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