The percent distribution of live multiple delivery births (three or more babies)

Question

The percent distribution of live multiple delivery births (three or more babies) in a particular year for women 15 to 54 years old is shown in the pie chart. Find each probability. 15-19 1.6% 20-24 6.4% 25-29 21.7% 30-34 37.3% 35-39 24.6% 40-44 5.3% 45-54 3.1% a. Randomly selecting a mother 30-39 years old P(30 to 39) (Round to the nearest thousandth as needed.) b. Randomly selecting a mother not 30-39 years old P(not 30 to 39) (Round to the nearest thousandth as needed.) c. Randomly selecting a mother less than 45 years old P(less than 45) (Round to the nearest thousandth as needed.) d. Randomly selecting a mother at least 20 years old P(at least 20) (Round to the nearest thousandth as needed.)

Explanation / Answer

a) P(30 to 39) = 0.373 + 0.246 = 0.619

b) P(Not 30 to 39) = 1 - 0.619 = 0.381

c) P(Less than 45) = 1 - P(More than or equal to 45) = 1 - 0.031 = 0.969

d) P(At least 20) = 1 - P(Less than 20) = 1 - 0.016 = 0.984

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