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March 1, 2015

Posted by **Patrick** on Wednesday, June 10, 2009 at 5:36pm.

ANSWER: 5:8?

Three Coins are tossed. Find the probability that exactly 2 coins show heads if the first coin shows heads.?

ANSWERS: Could it be 1/4?

- Advanced Math -
**PsyDAG**, Thursday, June 11, 2009 at 12:21pmThe first answer is correct.

For the second, once you have the first head there are four possibilities for the other two coins:

HH

TT

TH

HT

They must show one head for there to be two heads. What proportion do you find?

I hope this helps. Thanks for asking.

- Advanced Math -
**Anonymous**, Wednesday, July 25, 2012 at 5:50pm5:8

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