» Probability Exercise – 1
18. Six boys and six girls sit in a row. What is the probability that the boys and girls sit alternatively.
(d) none of these
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Related Posts Probability » Exercise - 19. If P (A) = 0.4, P (B) = x, P (A ∪ B) = 0.7 and the events A & B are independent, then x = (a) 1/3 (b) 1/2 (c) 2/3 (d) none of these Probability » Exercise - 120. 3 dice are thrown simultaneously. What is the probability of obtaining a total of 17 or 18 ? (a) 1/9 (b) 1/72 (c) 1/54 (d) none of these Probability » Exercise - 114. If A & B are two mutually exclusive events, then P (A + B) = (a) P (A) + P (B) - P (AB) (b) P (A) - P (B) (c) P (A) + P (B) (d) P (A) + P (B) + P (AB) Probability » Exercise - 113. If A & B are any two events, then the probability that exactly one of them occur is : (a) P (A) + P (B) - P (A ∩B) (b) P (A) + P (B) - 2 P (A ∩B) (c) P (A) + P (B) - P (A ∪B) (d) P (A) + P (B) - 2 P (A ∪B) Probability » Exercise - 124. The letter of the word “ASSASSIN” are written down at random in a row. The probability that no two S occur together is : (a) 1/35 (b) 1/14 (c) 1/15 (d) none of these