Saturday

December 20, 2014

December 20, 2014

Posted by **Lucy** on Saturday, January 3, 2009 at 12:03pm.

My answer: is 1/3 because there are only two numbers that are even and greater than 3 on the number cube.

Teacher marked this as wrong. How did I mess this one up?

- Pre-cal -
**Reiny**, Saturday, January 3, 2009 at 12:19pmthis sure looks like a "conditional" probability.

in general

P(A│B) = P(A AND B)/P(B)

read: P(A│B) as "the prob of A given B"

so let A be (even number)

let B be (greater or equal to 3)

so P(A and B) = 2/6 = 1/3

P(B) = 4/6 = 2/3

so P(A│B) = (1/3)/(2/3) = 1/2

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