Question

Given that the P(A) = 0.32, P(B) = 0.34, and = 0.56, find the P( B ' | A' ).

Answer 1

did you mean to have \[P(A\cup B)=.56\]

Answer 2

or...same thing..\[P(A\text{ or }B)=.56\]

Answer 3

Zarkon, btw, "and" is intersection, not union.

Answer 4

yes..I know...i'm using OR

Answer 5

I guess I'm a little confused then. I would have thought it was P(A and B) = 0.56.

Answer 6

no...\[\cup\] is the same as OR in probability

Answer 7

\(\cap\) is intersection...and AND

Answer 8

I realize that. That's not exactly where my confusion lies. Why are you using OR in the first place?

Answer 9

it cant be AND...that would be a contadiction

Answer 10

for any events \(A,B\)

\[P(A\cap B)\le P(A)\]

and

\[P(A\cap B)\le P(B)\]

Answer 11

Ah, yes. Very true.

Answer 12

His usage of the word "and" got me started off on the wrong track. Thank you.

Answer 13

ah...ic