Question

Events A and B are disjointed.

P(A) =8/15 ; P(B) =4/15 .

Find P(A or B).



Events A and B are disjointed.

P(A) =4/11 ; P(B) = 3/11.

Find P(A or B).

Answer 1

if the events are disjointed, then P(A or B) = P(A) + P(B)

Answer 2

so 7/11 for 2

Answer 3

yes

Answer 4

4/5 for 1