Question

n a 1974 Dear Aby letter, a woman lamented thet she had nt iven birth to her eighth child,ad wr s Hrdctor had assured her that the chance f L What was the real probability that the eighth child would be a girt? . Before the birth of the first child, what was the probability that the woman would ghve birth to eight girts in a row О a.0.5, 0.01 O C.0.5, 0.5 d. 0.0009, 0.0029

Answer 1

Answer

(A) Probability of a boy or girl child is equal to 1/2 = 0.5

So, probability that the eighth child would be a girl is equal to $p^n$

where p is probability = 0.5 and n is number of child = 8th

So, setting the values, we get

probability that the eighth child would be a girl =

(B) Before the birth of first child, the probability of having a boy or a girl child is independent for each time.

So, each time there is equal probability of having a boy or a girl child

we have all independent births, so the probability of having eight girls in a row is equal to $p^n$

where p = 0.5 and n = 8

setting the values, we get

probability of having eight girl child in a row=

So, option D is correct answer