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.

Printable View

- Nov 2nd 2013, 03:18 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, 03:33 AMPlatoRe: probability of at least two.
- Nov 2nd 2013, 03:36 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, 03:39 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, 05:56 AMHallsofIvyRe: probability of at least two.
- Nov 2nd 2013, 11:37 AManthonyeRe: probability of at least two.
Ok thank you I went and looked at it again I see now.

Thank you both.