The following data represent the number of live multiple-delivery births (three or more babies) in a particular year for women 15 to 54 years old.

(a) Determine the probability that a randomly selected multiple birth for women 15–54 years old involved a mother 30 to 39 years old.

(b) Determine the probability that a randomly selected multiple birth for women 15–54 years old involved a mother who was not 30 to 39 years old.

(c) Determine the probability that a randomly selected multiple birth for women 15–54 years old involved a mother who was less than 45 years old.

(d) Determine the probability that a randomly selected multiple birth for women 15–54 years old involved a mother who was at least 40 years old. Interpret this result. Is it unusual?

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Weapon Handgun Probability 0.475 Rifle 0.027 Shotgun 0.034 Unknown firearm 0.143 Knives 0.134 Hands, fists, etc. 0.054 Other 0.133