In a studio audience of 100 people, 40% of these people have an envelope taped underneath their chairs.  20% of these people will have "You Won" in their envelope, the rest will have empty envelopes.  How many people will win a prize?
40% of the 100 studio audience will have an envelope under their chair so .40*100 = <<100*.40=40>>40 people will find an envelope
20% of these 40 people will find a "You Won" notice so only .20*40 = <<.20*40=8>>8 people will win
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