re: Cashier at store told me one guy has spent $4000 on Powerball

quote:

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Identical boys Identical girls Fraternal Boys Fraternal Girls Fraternal girl/boy Identical boy/girl 4/6 = 2/3

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No. Boy/Girl must be includes with Girl/Boy. In other words, there are two possiblities of having a boy (twin 1 or twin 2); it's like flipping a coin. HERE Is a good explanation.

The four outcomes are as follows:

BB
GG
BG
GB

So it's 3/4.