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posted by Sara Wednesday, March 10, 2010 at 1:25pm.

Find the probability of tossing exactly 2 heads on 3 tosses of a fair coin.

HHH,HHT,HTH,THH,TTH,THT,HTT,TTT-- 8 ways 3 have 2 heads prob(2 out of 3 H) = 3/8

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