A couple decided to have 4 children. What is the probability that they will have at least 3 boys

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

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

21

jk it's 20

step-by-step explanation: