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## Tuesday, December 4, 2012

### 8th Math Probability CBSE Test Paper

Work sheet: Subject – Maths, Class – VIII- Chapter: Probability

1. A coin is tossed twice. Find the robability of getting both tails?

2. Find the probability of getting even number between 10 to 25.

3. A die is thrown once. Find the probability of getting a prime number.

4. One card is drawn from a well shuffled deck of 52 cards. Find the probability of getting a face card.

5. What is the maximum value of the probability for an event?

6. A bag contains 9 red, 7 white and 4 black balls. A ball is drawn at random. Find the probability that the ball drawn is not red.

7. In the word “EDUCATION” find the probability of getting a vowel.

8. Out of 400 bulbs in a box, 15 bulbs are defective. One bulb is taken at random from the box. Find the probability that the bulb is not defective.

9. A die is thrown once. What is the probability of getting a multiple of 3.

10. A card is drawn from a pack of 52 cards. Find the probability of drawing a red face card.

11. A box contains 19 cards having numbers 1, 2, 3, .... 19. A card is drawn from the box. What is the probability that the number on the card is divisible by 5.

12. Three coins are tossed together. What are the total number of possible outcomes.

13. A letter of English alphabet is chosen at random. Find the probability that the letter chosen is a vowel.

14. A class has 40 students, 25 boys and 15 girls. A student of the class is selected at random as the monitor. Find the probability of selecting a girl student as the monitor.

15. Two dice are thrown simultaneously. Find the probability of getting an even number as the sum.

16. In a family of two children. Find the probability of at least one girl child.

17 . From 1 to 50 find the probability of getting a multiple of 6.

18. Three unbiased coins are tossed together. Find the probability of getting: (i) all heads (ii) two heads (iii) one head (iv)At least two head

19.Find the probability that a leap year selected at random will contain 53 Sundays.

20. Two dice are thrown simultaneously. Find the probability of getting: (i) a doublet i.e. same number on both dice. (ii) The sum as a prime number.

Ans:
1. ¼                 2. ½                            3. ½               4. 3/13                       5. 1
6. 11/20           7. 5/9                           8. 77/80         9. 1/3                         10. 3/26
11. 3/19 12 .    8 13.5/26                      14.3/8            15.1/2                        16.3/4
17.4/25            8. 1/8 , 3/8 , 3/8,1/2      19.2/7            20. 1/6, 5/12