If necessary consult a list of formulas PAB PAB Suppose that
(If necessary, consult a list of formulas.)
P(A?B)=
P(A?B)=
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Solution
For independent events :
P(A n B) = P(A) * P(B)
P(A n B) = 0.5 * 0.3 = 0.15
So, P(A n B) = 0.15
Now, P(A u B) = P(A) + P(B) - P(A n B)
P(A u B) = 0.5 + 0.3 - 0.15
P(A u B) = 0.8 - 0.15
P(A u B) = 0.65
So, answers are :
P(A n B) = 0.15
P(A u B) = 0.65
