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Posted by on Sunday, October 4, 2009 at 7:31pm.

Three quarters are tossed, and a tail appears on at least one of them. What is the probability that at least one head appears? Express your answer as a common fraction.

I'm confused on this problem. I don't even know what the problem is asking. :D

  • Mathematics - , Sunday, October 4, 2009 at 7:33pm

    The possible outcomes were

    HHt
    Htt
    ttt

    So, the probability of at least one head is 2/3

  • Mathematics - , Sunday, January 20, 2013 at 12:36pm

    6/7 because 7/8 and 6/7

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