4. Let A be an event. If the probability that A occurs is twice the prob. that A does not occur, then the probability of A is: OA. 1/2 OB. 1/4 OC. 1/3 OD. 2/3

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4. Let A be an event. If the probability that A occurs is twice the proba
A does not occur, then the probability of A is:
that
O O O O
OA. 1/2
B. 1/4
OC.
1/3
OD. 2/3
5. If A and B are independent events, which of the following statements is
always true?
A. P(A/B) = P(A)
OB. P(AUB) = P(A) + P(B)
OC. P(A) = P(B)
All of the above
6. If Z is a standard Normal random variable, then the P(Z < 0) is
OA. O
OB. 0.5
O C. 1
OD. A z-table is needed.
Transcribed Image Text:4. Let A be an event. If the probability that A occurs is twice the proba A does not occur, then the probability of A is: that O O O O OA. 1/2 B. 1/4 OC. 1/3 OD. 2/3 5. If A and B are independent events, which of the following statements is always true? A. P(A/B) = P(A) OB. P(AUB) = P(A) + P(B) OC. P(A) = P(B) All of the above 6. If Z is a standard Normal random variable, then the P(Z < 0) is OA. O OB. 0.5 O C. 1 OD. A z-table is needed.
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