The probability histogram on the following page represents the number of live births by a mother 50 to 54 years old who had a live birth in 2007.

(a) What is the probability that a randomly selected 50- to 54-year-old mother who had a live birth in 2007 has had her fourth live birth?
(b) What is the probability that a randomly selected 50- to 54-year-old mother who had a live birth in 2007 has had her fourth or fifth live birth?
(c) What is the probability that a randomly selected 50- to 54-year-old mother who had a live birth in 2007 has had her sixth or more live birth?
(d) If a 50- to 54-year-old mother who had a live birth in 2007 is randomly selected, how many live births would you expect the mother to have had?

Transcribed Image Text:

Number of Live Births, 50 to 54-Year-Old Mother 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0.313 0.244 0.165 0.099 0.054 0.043 0.061 0.021 Child Number