Another Probability Question

[Jason76]

\(\displaystyle P(A \cup B) = P(A) + P(B) - P(A \cap B)\)

What does this mean? How does this relate to the bell curve?

I know the first part means the union of A and B equals the probability of A plus the probability of B minus ??

 

[srmichael]

\(\displaystyle P(A \cup B) = P(A) + P(B) - P(A \cap B)\)

What does this mean? How does this relate to the bell curve?

I know the first part means the union of A and B equals the probability of A plus the probability of B minus ??

See my post in this link:

http://www.freemathhelp.com/forum/threads/85772-General-Addition-Rule-for-Probability