CBSE Class 11 Probability Worksheet B

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1. If E and F are events such that P(E) 1/4= P(F) ½ = and P(E and F) 1/8 = find P(not E and not F)

2. A letter is chosen at random from the word ‘ASSASSINATION’. Find the prob. that letter is a consonant.

3. There are four men and six women on the city council. If one council member is selected for a committee at random, how likely is it that at it is a woman?

4. 4 cards are drawn from a well snuffled deck of 52 cards what is the prob. of obtaining 3 diamonds and one spade.

5. Describe the sample space. A coin is tossed and a die is thrown.

6. From a group of 2 boys and 3 girls, two children are selected at random. Describes the sample space associated with

(i)  E₁: both the selected children are boys

(ii) E₂: at least one selected child is a boy

(iii) E₃: one boy and one girl is selected

(iv)  E₄: both the selected children are girls

7. A book contains 100 pages. A page is chosen at random. What is the chance that the sum of the digit on the page is equal to 9

8. A pack of 50 tickets numbered 1 to 50 is shuffled and the two tickets are drawn find the prob.

(i) Both the ticket drawn bear prime no.

(ii) Neither of the tickets drawn bear prime no.

9. 20 cards are numbered from 1 to 20. One card is drawn at random what is the prob. that the no. on the card drawn is (i) A prime no. (ii) An odd no. (iii) A multiple of 5 (iv) Not divisible by 3.

10. In a single throw of three dice, find the prob. of getting 

(i) A total of 5 (ii) A total of at most 5. 

Click on link below to download CBSE Class 11 Probability Worksheet B.