Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

48 defective pens are accidentally mixed with 56 good ones. It is not possible to just look at a pen and tell whether it is defective or not. One pen is taken out at random. What is the probability that it is a defective pen?

### Question 2

9 tumblers are lying inverted on a table. 7 of them contain balls, but 2 of them are empty. What is the probability of getting a ball if one of the tumblers is opened randomly?

### Question 3

A bag contains 2 Red, 4 Blue and 7 Green marbles. What is the probability of drawing a Red marble if 2 marbles are drawn out randomly?

**A**

${23/78}$.

**B**

$7/13$.

**C**

$24/78$.

**D**

$28/78$.

**Soln.**

**Ans: a**

Total number of marbles is 13. Combinations of 2 marbles that are possible = ^{13}C_{2} = ${13 × 12}/2$ = 78. If one of the two balls is red, then red + red is one possibility, and 2 × (4 + 7) are the other possibilities. So total favorable outcomes = 1 + 2 × 11 = 23, and the probability is 23/78 = ${23/78}$.

### Question 4

Karmjeet and Sham are friends. What is the probability that both will have different birthdays, ignoring a leap year?

### Question 5

A box contains 5 pink, 2 maroon and 6 cyan balls. What is the probability of drawing a ball that is neither maroon nor pink?

### More Chapters | See All...

Deductive Reasoning | Problems on Numbers | Profit and Loss | abba Series | Logarithms | Distance and Time | Mirror Images | Passwords and Inputs | Verification of truth | Time and Work | More...

This Blog Post/Article "Probability Quiz Set 012" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2019-08-18.