X + 7= -209
please answer :)

x = - 216

Step-by-step explanation:

x + 7 = -209

x = -209-7

x = -216

hope you got it.

That’s a simple statistical question under fair assumption:

that the probability that each child is a boy is the same ( identically distributed)

that the probability that each child is independent of the sex of the preceding child

Under such assumption, if we denote P the probability that a child is a boy and therefore 1-P is the probability that the child is the girl then the number of girl in four children for this couple follow a B(4, 1-P) where B is the Binomial distribution (you may want to read more about this since it’s a really common distribution).

Therefore the answer to your question is the probability:

1 - P(B(4, 1-P)=4) = 1 - (1-P)^4 (simplified formula)

If the probability was 0.5, this leads to the answers below, i.e. 0.9375.

Step-by-step explanation:

hope this helps! have a great day :D