Question 1151544: If two events are mutually exclusive, why is
Upper P left parenthesis Upper A and Upper B right parenthesis equals 0P(A and B)=0?
Found 2 solutions by greenestamps, ikleyn:
Answer by greenestamps(13200)   (Show Source):
You can put this solution on YOUR website!
By definition, mutually exclusive means they can't both be true at the same time.
P(A and B) is the probability that they are both true at the same time.
Since they can't be true at the same time, the probability is 0.
Answer by ikleyn(52797)  (Show Source):
You can put this solution on YOUR website! .
Hey, we live in XXI century, for your info.
In this century, and just three hundred years (at least), nobody writes a Math text as you do.
If you able to write P(A and B) = 0, it is just fully enough to express your thought.
Had you write in correct way, I'd refer you to sources to read about the mutually exclusive events.
But since you write in this way as you do, I better will leave you without this reference.
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