Question

If A and B are independent events such that Pr(A∩B) = 0.13 and Pr(B) =0.32, then, correct to four decimal places, Pr(A∪B) is equal to:
a)0.2163
b)0.0416
c)0.4063
d)0.45
e)cannot be determined

Answer 1

i've forgotten this topic completely...but i just want to write a formula :
\[P(A \cup B)=P(A)+P(B)-P(A∩ B)\] is that right?

Answer 2

yes.

Answer 3

what to do now? we dont have the value of \(P(A)\)

Answer 4

Also for an independent event