A sack contains 5 white balls and 6 red balls. assume the balls are distinct.

In how many ways can we select 4 balls and get at least 1 red ball?

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- Oct 13th 2009, 12:16 PMLAURA.GOODMANProbability problem
A sack contains 5 white balls and 6 red balls. assume the balls are distinct.

In how many ways can we select 4 balls and get at least 1 red ball?