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you want to invite 5 of 8 friends. how many choices if: P(sum of 2 dice...

you want to invite 5 of 8 friends. how many choices if: P(sum of 2 dice is odd)

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Answer #1

It seems that you have mixed two questions in one and the question seems wrong or incomplete, if you wanted to ask this question, then here is the answer:

Question :- you want to invite 5 of 8 friends. How many choices if:

a) 2 of them refuse to attend together?

b) 2 of them will only attend together?

Answer:-

a) there are 6c5 = 6 possible ways that 2 of them refuse to attend together  

(b) There are 6c3 = 20 possible ways that 2 of them will attend together

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