1. If the probability of winning a game is 0.996, then the probability of losing game is....
A) -1 B) 1 C) 0.0040 D) 0.4
Ans: C
2. If the probability of happening an event is x. Then the probability of its non happening is.......
A) x - 1 B) 1 - x C) 1 - 1/x D) x
Ans: B
3. The letter of word “EENADU” is chosen a letter is selected random, then the probability that the letter is a consonant is ......
A) 5/6 B) 4/6 C) 2/6 D) 1
Ans: C
4. The letter of English alphabet is chosen at random, then the probability that the letter is a vowel is ........
A) 5/26 B) 21/26 C) 10/13 D) 11/13
Ans: A
5. If a number ‘x’ is chosen from the numbers 1, 2, 3 and a number ‘y’ is chosen from the numbers 1, 4, 9 then p(xy < 9) =
A) 7/9 B) 2/3 C) 5/9 D) 1/9
Ans: C
6. A bag contains cards numbered from 1 to 30. One card is drawn at random from the bag. Probability of getting which is divisible by both 2 & 3 is...
A) 1/3 B) 1/6 C) 3/5 D) 2/15
Ans: B
7. A box contains 100 tokens on which 1 to 100 are marked, one token taken that getting a perfect cube is .....
A) 1/50 B) 1/100 C) 1/75 D) 1/25
Ans: D
8. Two dice are thrown at the same time. What is the probability that the sum of the two numbers appearing on the top of the dice is 10?
A) 5/36 B) 4/36 C) 1/12 D) 1
Ans: C
9. A box contains 10 red marbles, 5 white marbles and 6 green marbles. One marble is taken out of the box at random. The probability that the marble taken out will be red is
A) 5/21 B) 6/21 C) 10/23 D) 10/21
Ans: D
10. Which of the following cannot be the probability of an event?
A) 1/5 B) 12% C) -0.004 D) 0.0007
Ans: C
11. A day is selected at random in a week. The probability that it is Wednesday or Sunday is .......
A) 1/7 B) 2/7 C) 4/7 D) None
Ans: B
12. Which of the following is wrong?
A) P(E) + P(Ē) = 1
B) If two dice are thrown, total no. of possible events is 36
C) 0 ≤ P(E) ≤ 1
D) P(E) + P(Ē) = 0
Ans: D
13. Three coins are tossed simultaneously then the number of all possible out comes is .........
A) 1 B) 4 C) 3 D) 8
Ans: D
14. P(E) = 0 is .......
A) Possible event B) Impossible event
C) Sure event D) None
Ans: B
15. Two different coins are tossed simultaneously. The probability of getting at least one head is
Ans: 4
16. A box contains 40 discs, numbered from 1 to 40. If one disc is drawn at random from the box, the probability that it bears a prime number less than 23 is
Ans: 3
17. If two different dice are rolled together, the probability of getting an even number on both dice is 
Ans: 4
18. In a family of 3 children, the probability of having at least one boy is
Ans: 1
19. The probability that a number selected at random from the numbers 1, 2, 3,...., 15 is a multiple of 4 is
Ans: 2
20. What is the probability that a leap year has 53 sundays?
Ans: 3
21. The probability of a certain event is
Ans: 1
22. A card is drawn at random from a pack of 52 cards. The probability that the drawn card is not an ace is
Ans: 4
23. A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is
Ans: 3
24. A bag contains cards numbered from 1 to 25. A card is drawn at random from the bag. The probability that the number on this card is divisible by both 2 and 3 is
Ans: 3
25. In a single throw of a dice, the probability of getting a multiple of 3 is
Ans: 2
26. If three coins are tossed simultaneously, then the probability of getting at least two heads is 
Ans: 4
27. The probability of guessing the correct answer to a certain test questions is 
. If the probability of not guessing the correct answer to this question is 
. Then x =
1) 4 2) 3 3) 6 4) 2
Ans: 3
28. A number is selected at random from the numbers 3, 5, 5, 7, 7, 7, 9, 9, 9, 9. The probability that the selected number is their mean is
Ans: 2
29. Which of the following cannot be the probability of an event?
Ans: 4
30. The probability of an impossible event is
Ans: 1
31. What is the probability that a non-leap year has 53 fridays?
Ans: 4
32. A month is selected at random in a year. The probability that it is March or May is
Ans: 2
33. From the letters of the word 'PRATIBHA', a letter is selected. The probability that the letter is a vowel
Ans: 1
34. If a two digit number is chosen at random, then the probability that the number chosen is a multiple of 10 is
Ans: 3
