If necessary consult a list of formulas PAB PAB Suppose that

(If necessary, consult a list of formulas.)

P(A?B=

P(A?B)=

Suppose that $\"Suppose$ and $\"\"$ are independent events such that $\"\"$ and $\"\"$ .

Find $\"\"$ and $\"\"$ .

(If necessary, consult a list of formulas.)

Note that

P(A) = 1 - P(A--)

P(A) = 1 - 0.50

P(A) = 0.50

As for independent events,

P(A and B) = P(A) P(B)

Then

P(A and B) = 0.50 (0.40) = 0.20 [ANSWER]

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Meanwhile,

P(A U B) = P(A) + P(B) - P(A and B)

= 0.50 + 0.40 - 0.20

= 0.70 [ANSWER]