PROBABILITY

Question 1

1. The probability of getting exactly one head in tossing a pair of coins is
   (a) 0
   (b) 1
   (c) 1/3
   (d) 1/2

Answer 1

(d)1/2

Question 2

2. The probability of getting a spade card from a well shuffled deck of 52 cards is
   a) 1/13
   b) 1/4
   c) 12/13
   d) 3/4

Answer 2

b)1/4

Question 3

3. The probability of getting less than 3 in a single throw of a die is
   a) 1/3
   b) 1/2
   c) 1/4
   d) 2/3

Answer 3

a)1/3

Question 4

4. The total number of events of throwing 10 coins simultaneously is
   (a) 1024
   (b) 512
   (c) 100
   (d) 10

Answer 4

(a) 1024

Question 5

5. Which of the following can be the probability of an event?
   (a) – 0.4
   (b) 1.004
   (c) 18/23
   (d) 10/7

Answer 5

(c) 18/23

Question 6

6. Three coins are tossed simultaneously. The probability of getting all heads is
   a) 1
   b) 1/2
   c) 1/4
   d) 1/8

Answer 6

d)1/8

Question 7

7. One card is drawn from a well shuffled deck of 52 cards. The probability of getting a king of red colour is
   a) 1/26
   b) 1/13
   c) 1/4
   d) 1/2

Answer 7

a)1/26

Question 8

8. One card is drawn from a well shuffled deck of 52 playing cards. The probability of getting a non-face card is
   a) 3/13
   b) 10/13
   c) 7/13
   d) 4/13

Answer 8

b)10/13

Question 9

9. The chance of throwing 5 with an ordinary die is
   a) 1/6
   b) 5/6
   c) 1/3
   d) 1/2

Answer 9

a)1/6

Question 10

10. The letters of the word SOCIETY are placed at random in a row. The probability of getting a vowel is
    a) 1/7
    b) 2/7
    c) 3/7
    d) 4/7

Answer 10

c)3/7

Question 11

12. The total events to throw three dice simultaneously is
    (a) 6
    (b) 18
    (c) 81
    (d) 216

Answer 11

(d) 216

Question 12

13. The probability of getting a consonant from the word MAHIR is
    a. 2/5
    b. 3/5
    c. 4/5
    d. 1

Answer 12

b.3/5

Question 13

14. A girl calculates that the probability of her winning the first prize in a lottery is 8/100. If 6,000 tickets are sold, how many tickets has she bought?
    (a) 400
    (b) 750
    (c) 480
    (d) 240

Answer 13

(c) 480

Question 14

15. A card is drawn from a well shuffled deck of 52 cards. The probability of a seven of spade is
    a. 3/52
    b. 1/52
    c. 1/26
    d. 1/13

Answer 14

b.1/52

Question 15

6. A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. The probability that a red ball drawn is
   a. 3/8
   b. 1/2
   c. 5/8
   d. 3/4

Answer 15

a.3/8

Question 16

17. A child has a die whose six faces show the letters as given below:
    A B C D E F
    The die is thrown once. The probability of getting a ‘D’ is
    a.1/2
    b.1/3
    c.1/4
    d.1/6

Answer 16

d.1/6

Question 17

18. One card is drawn from a well-shuffled deck of 52 cards. The probability that the card will not be an ace is
    a. 1/13
    b. 4/13
    c. 12/13
    d. 3/13

Answer 17

c.12/13

Question 18

19. A lot consists of 144 ball pens of which 20 ae defective and the others are good. Tanu will buy a pen if it is good but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. The probability that she will buy that pen is
    a. 5/36
    b. 20/36
    c. 31/36
    d. 31/144

Answer 18

c.31/36

Question 19

20. A ticket is drawn at random from a bag containing tickets numbered from 1 to 40. The probability that the selected ticket has a number which is a multiple of 5 is
    a. 3/5
    b. 1/5
    c. 1/3
    d. 4/5

Answer 19

b.1/5