SOLUTION: Let X denote the number of girls in a family with four children. Calculate P(X ≥ 3). I honestly don't even know where to begin with this. Can someone please explain ho

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Question 1130938: Let X denote the number of girls in a family with four children. Calculate P(X ≥ 3).
I honestly don't even know where to begin with this.
Can someone please explain how to solve such a question please?
Thank you!

Answer by math_helper(2461)   (Show Source): You can put this solution on YOUR website!
Let X denote the number of girls in a family with four children. Calculate P(X ≥ 3).
I honestly don't even know where to begin with this.
=============================
They want the probability that the number of girls is 3 or 4 in a family of four children:








To verify, we can enumerate all possible Boy/Girl families of four children:

BBBB
BBBG
BBGB
BBGG
BGBB
BGBG
BGGB

GBBB
GBBG
GBGB

GGBB




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