Probability » Exercise - 18. A card is drawn at random from a pack of cards . The probability of this card being a red or a queen is : (a) 1/13 (b) 1/26 (c) 1/2 (d) 7/13
Probability » Exercise - 130. From the word “POSSESSIVE”, a letter is chosen at random. The probability of it to be S is : (a) 3/10 (b) 4/10 (c) 3/6 (d) 4/6
Probability » Exercise - 127. If A & B are two independent events such that P (A ∩ B′) = 3/25 and P (A′ ∩ B) = 8/25, then P (A) = (a) 1/5 (b) 3/8 (c) 2/5 (d) 4/5
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 - 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 - 18. A card is drawn at random from a pack of cards . The probability of this card being a red or a queen is : (a) 1/13 (b) 1/26 (c) 1/2 (d) 7/13