Mathematics, 20.03.2020 08:54 beluvangel418

I roll a fair die twice and obtain two numbers X1= result of the first roll and X2= result of the second roll. Given that I know X1+X2=7, what is the probability that X1=4 or X2=4?

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I roll a fair die twice and obtain two numbers X1= result of the first roll and X2= result of the se...

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