Homework Help: math

Posted by austin on Saturday, November 1, 2008 at 11:51pm.

flip a coin 3 times
a) what are the odds in favor of getting exactly 2 heads
b) what are the odds against getting at most 1 tail

i got a) 3/4 b) 7/8
i dont think they are right can someone help

math - PsyDAG, Sunday, November 2, 2008 at 1:28am
If you flip a coin 3 times, here are the possible combinations:

HHH
THH
HTH
HHT
HTT
THT
TTH
TTT

Only 3 of the 8 possibilities will have exactly 2 heads.

The odds against getting at most 1 tail are the same as getting no tails. You are right with that answer.

I hope this helps. Thanks for asking.

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