Question

if A and B are mutually exclusive or exhaustive events then p(A)+p(B)=​

Answer 1

Answer:

B

41

Since P(A) and P(B) are two mutually exclusive and exhaustive events, P(A)+P(B)=1 and P(B)=3P(A)

⇒P(A)+3P(A)=1              

⇒4P(A)=1

⇒P(A)=41

⇒P(B)=1−41=43

⇒ P(B) =1−43=41.

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