1 In a simultaneous throw of two coins, the probability of getting at least one head is : A) 1/2 B) 1/3 C) 2/3 D) 3/4
2 Three unbiased coins are tossed. What is the probability of getting at most two heads ? A) 3/4 B) 1/4 C) 3/8 D) 7/8
3 What is the probability of getting a sum 9 from two throws of a dice ? A) 1/6 B) 1/8 C) 1/9 D) 1/12
4 In a simultaneous throw of two dice, what is the probability of getting a total of 10 or 11 ? A) 1/4 B) 1/6 C) 7/12 D) 5/36
5 Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn bears a number which is a multiple of 3 ? A) 3/10 B) 3/20 C) 2/5 D) 1/2
6 A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is : A) 1/13 B) 2/13 C) 1/26 D) 1/52
7 One card is drawn from a pack of 52 cards. What is the probability that the card drawn is either a red card or a king ? A) 1/2 B) 6/13 C) 7/13 D) 27/52
8 From a pack of 52 cards, one card is drawn at random. What is the probability that the card drawn is.a ten or a spade ? A) 4/13 B) 1/4 C) 1/13 D) 1/26
9 The probability that a card drawn from a pack of 52 cards will be a diamond or a king, is : A) 2/13 B) 4/13 C) 1/13 D) 1/52
10 From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings ? A) 1/15 B) 25/57 C) 35/256 D) 1/221
11 Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is : A) 3/20 B) 29/34 C) 47/100 D) 13/102
12 Two cards are drawn from a pack of 52 cards. The probability that either both are red or both are kings, is : A) 7/13 B) 3/26 C) 63/221 D) 55/221
13 A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white ? A) 3/4 B) 4/7 C) 1/8 D) 3/7
14 A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective, is : A) 4/19 B) 7/19 C) 12/19 D) 21/95
15 A speaks truth in 75% cases and B in 80% of the cases. In what percentage of cases are they likely to contradict each other, narrating the same incident ? A) 5% B) 15% C) 35% D) 45%