A coin is tossed 4 times. Find the probability that exactly 2 heads will appear.
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a box contains 3 $1 bills, 2 $5 bills, 1 $10 bill and 1 $20 bill. construct a probability distribution
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A coin is tossed 4 times. Find the probability that exactly 2 heads will appear.
a box contains 3 $1 bills, 2 $5 bills, 1 $10 bill and 1 $20 bill. construct a probability distribution