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October 12th, 2013, 11:52 AM   #1
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probability could please check answer(2)

The two events A and B have probabilities 0.2 and 0.4. Also P (A n B)=0:08.
(a)Are the two events A and B independent? Explain.
(b) Find the probability that either A or B or both occur.
(c) Find the probability that neither A nor B occurs.
(d) Find the probability that exactly one of A or B occurs.

(a) For 2 events to be independent they must satisfy:
P(A n B) = P(A)*P(B)

which makes them independent .. Correct ?

(b) hmm not sure about this one! need some helpp

(c) P(neither A or B) = 0.8*0.6 Correct?

(d) hmm maybe P = 0.2*0.6 + 0.4*0.8 = 0.44 ?????
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October 12th, 2013, 11:57 AM   #2
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Re: probability could please check answer(2)

Your responses are all correct. The event of (b.) is actually the complement of (c.) if you check carefully. Hence, the answer for this one is .
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