I hope this helps you
x=3
f (3)= 3.3-2
f (3)= 9-2
f (3)= 7
8.83176088663 is the answer
Answer:

Step-by-step explanation:
If the probability of having a boy or a girl is the same, then
the probability of having a boy = a probability of having a girl = 1/2.
Let B denote boy and G denote the girl.
The sample space of having three children is:
BBB, BBG, BGB, GBB, BGG, GBG, GGB, GGG.
The probabilities of each of those events is
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