Question

Find P(A or B), if events A and B are overlapping. P(A) = 9/18 P(B) = 5/18 P(A and B) = 3/18

please my entire grade counts on this i will brainliest

Answer 1

Inclusion/exclusion principle:

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

$\implies P(A\cap B)=\dfrac9{18}+\dfrac5{18}-\dfrac3{18}=\dfrac{11}{18}$