Question: The graph of the discrete probability distribution below represents the number of live births by a mother 50-54 years old who had a live birth

The graph of the discrete probability distribution below represents the number of live births by a mother 50-54 years old who had a live birth in 2013.

(a) What is the probability that a randomly selected 50- to 54-year-old mother who had a live birth in 2013 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 2013 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 2013 has had her sixth or more live birth?
(d) If a 50- to 54-year-old mother who had a live birth in 2013 is randomly selected, how many live births would you expect the mother to have had?

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