Anon, look at this question and the solution.
http://www.jiskha.com/display.cgi?id=1353895450
Yours is the same type.
44% of adults say cashews are their favorite kind of nut. You randomly select 12 people and ask each to name their favorite nut. Find the probability that the number who say cashews are their favorite nut (a) exactly three, (b) at least four, and (c) at most two.
2 answers
14%