Hi;

I'm having trouble with this question.

Three coins are tossed what is the probability of getting three

heads if it is known that at least two heads were obtained?

Thanks.

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- Nov 2nd 2013, 04:18 AManthonyeprobability of at least two.
Hi;

I'm having trouble with this question.

Three coins are tossed what is the probability of getting three

heads if it is known that at least two heads were obtained?

Thanks. - Nov 2nd 2013, 04:33 AMPlatoRe: probability of at least two.
- Nov 2nd 2013, 04:36 AManthonyeRe: probability of at least two.
So the answer is 1/2. I just want confirmation because my book says 1/4.

- Nov 2nd 2013, 04:39 AManthonyeRe: probability of at least two.
OH also the formula is it P(A given B) = (A and B)/P(B) I sure this is correct but whats P(A and B) in this question.

Thanks. - Nov 2nd 2013, 06:56 AMHallsofIvyRe: probability of at least two.
- Nov 2nd 2013, 12:37 PManthonyeRe: probability of at least two.
Ok thank you I went and looked at it again I see now.

Thank you both.