# is it true that probability of occurrence of event A or B =P(A+B) =P(A)+P(B)

Given statement is

__not true__.

Probability of occurence of A or B is denoted by $P(A\cup B)$

and probability of occurence of A or B or atleast one of A or B$P(A\cup B)=P\left(A\right)+P\left(B\right)-P\left(A\cap B\right)$

if events are mutually exclusive then $P(A\cap B)=0$

now $P(A\cup B)=P\left(A\right)+P\left(B\right)$

hope this will help

enjoy

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