The probability histogram to the right represents the number of live births by a

Question

The probability histogram to the right represents the number of live births by a mother 48 to 51 years old who had a live birth in 2012. What is the probability that a randomly selected 48- to 51 -year-old mother v4io had a live birth in 2012 has had her fourth or fifth live birth? What is the probability that a randomly selected 48- to 51 -year-old mother who had a live birth in 2012 has had her sixth or more live birth If a 48- to 51-year-old mother who had a live birth in 2012 Is randomly had?

Explanation / Answer

d)

Consider:

Thus,  
  
E(x) = Expected value = mean = Sum(xP(x)) =   3.02 = 3.0 [ANSWER]

x P(x) x P(x) 0.233 1 0.233 0.288 2 0.576 0.163 3 0.489 0.112 4 0.448 0.097 5 0.485 0.019 6 0.114 0.029 7 0.203 0.059 8 0.472

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