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1. If A and B are two events of sample space S, then
A. P(A ∩ B) = P(B)P(A/B); P(B) ≠ 0
B. P(A ∪ B) = P(A)P(A/B); P(B) ≠ 0
C. P(A ∪ B) = P(B)P(A/B); P(B) ≠ 0
D. P(A ∩ B) = P(A)P(A/B); P(B) ≠ 0
2. If 2P(A) = P(B) = 5/13 and P(A|B) = 2/5, then P ∪ B) = ...
A. 11/13
B. 2/13
C. 15/26
D. 11/26
3. If A, B and C are three events of sample space S, then
A. P(A∩B∩C) = P(A).P(A/B).P(C/A∪B)
B. P(A∩B∪C) = P(A).P(B/A).P(C/A∩B)
C. P(A∪B∪C) = P(A).P(B/A).P(C/A∩B)
D. P(A∩B∩C) = P(A).P(B/A).P(C/A∩B)
5. Let E and F be events of a sample space S of an experiment, then P(E'/F) = ...
A. P(E/F)'
B. P(E').P(F)
C. P(E')/P(F)
D. 1 - P(E/F)
6. If is imaginary cube root of unity, then = ……
A. -2ω2
B. 1
C. 0
D. ω2
8. Three coins are tossed. If at least two coins show head, the probability of getting one tail is:
A. 3/4
B. 1/3
C. 1
D. 2/3
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