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April 20, 2014

Homework Help: Algebra/Trig

Posted by jelanietux on Monday, June 20, 2011 at 6:18pm.

The members of a menís club have a choice of wearing black or red vests to their club meetings. A study done over a period of many years determined that the percentage of black vests worn is 60%. If there are 10 men at a club meeting on a given night, what is the probability, to the nearest thousandth, that at least 8 of the vests worn will be black?

I know you're supposed to use combinations, but how do you write it all out?

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