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put this solution on YOUR website!a coin is tossed 4 times and the sequence of heads and tails is observed:
(a)how many different outcomes are possible
Ans: 2^4 = 16 outcomes
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(b)how many different outcomes have exactly 3 tails
Ans: Same as "how many have exactl one head": that number is 4
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(c)how many different outcomes have at least 1 tail
#(at least 1 tail) = 16 - #(no tail) = 16-1 = 15
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Cheers,
Stan H.
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