How do you find the probability of or
Finding probability of or :
For two mutually exclusive events and , the probability of or is given by:
But if eventsand are not mutually exclusive then probability of or is given by:
For eg. if is the event of getting head and is the event of getting tail when a coin is tossed. Then and are mutually exclusive events.
Hence, probability of or is .
Let denote the event of getting an even number and denote the event of getting when a dice is rolled.
, ,
Hence, probability of or is .
Thus, in this way probability of or can be found out.