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 least 2 heads ? A) 1/4 B) 1/2 C) 1/3 D) 1/8
3 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
4 In a single throw of a die, what is the probability of getting a number greater than 4 ? A) 1/2 B) 1/3 C) 2/3 D) 1/4
5 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
6 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
7 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
8 Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ? A) 1/2 B) 2/5 C) 8/15 D) 9/20
9 In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize ? A) 1/10 B) 2/5 C) 2/7 D) 5/7
10 One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card ? A) 1/13 B) 4/13 C) 1/4 D) 9/52
11 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
12 A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is : A) 1/22 B) 3/22 C) 2/91 D) 2/77
13 A bag contains 6 white^and 4 red balls. Three balls are drawn at random. What is the probability that one ball is red and the other two are white ? A) 1/2 B) 1/12 C) 3/10 D) 7/12
14 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%
15 A man and his wife appear in an interview for two vacancies in the same post. The probability of husband's selection is (1/7) and the probability of wife's selection is (1/5). What is the probability that only one of them is selected ? A) 4/5 B) 2/7 C) 8/15 D) 4/7