Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

A box contains 4 sky blue, 2 dark green and 8 khaki balls. What is the probability of drawing a ball that is neither dark green nor sky blue?

### Question 2

A bag contains 2 Red, 4 Blue and 8 Green marbles. What is the probability of drawing a Red marble if 2 marbles are drawn out randomly?

**A**

${25/91}$.

**B**

$8/14$.

**C**

$26/91$.

**D**

$30/91$.

**Soln.**

**Ans: a**

Total number of marbles is 14. Combinations of 2 marbles that are possible = ^{14}C_{2} = ${14 × 13}/2$ = 91. If one of the two balls is red, then red + red is one possibility, and 2 × (4 + 8) are the other possibilities. So total favorable outcomes = 1 + 2 × 12 = 25, and the probability is 25/91 = ${25/91}$.

### Question 3

A box contains 4 maroon, 7 sky blue and 3 dark green balls. What is the probability of drawing a ball that is neither sky blue nor maroon?

### Question 4

A box contains 8 maroon, 5 navy and 3 pink marbles. What is the probability of drawing a marble that is not pink if 2 marbles are drawn out randomly?

**A**

${13/20}$.

**B**

$3/16$.

**C**

$14/120$.

**D**

$18/120$.

**Soln.**

**Ans: a**

Total number of marbles is 16. Combinations of 2 marbles that are possible = ^{16}C_{2} = ${16 × 15}/2$ = 120. Chances of drawing a non-pink ball are ^{13}C_{2} = $(13 × (13 - 1))/2$ = 78. So probability = 78/120 = ${13/20}$.

### Question 5

If P(E) = 0.59, then what is the probability of non-occurrence of E?

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This Blog Post/Article "Probability Quiz Set 004" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2019-08-18.