A bag contains 4 red balls and 5 black balls. In how many ways can i make a selection so as to take at least 1 red ball and 1 black ball
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take out one ball from both bags
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We have 4 red balls and 5 black balls we need to have atleast 1 ball from each of them
So
(2^4 -1)*(2^5-1) =465
where -1 in each of them indicates that we are taking out chances of haveing 0 ball
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