Probability Quiz Set 003

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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?

 A

${4/7}$.

 B

$9/14$.

 C

$5/91$.

 D

$9/91$.

Soln.
Ans: a

Total number of marbles is 14. We have to basically find the probability of picking a khaki ball, for which 8 chances are favorable. So probability = 8/14 = ${4/7}$.


Question 2

A bag contains three marbles 4 Red, 5 Green and 3 Blue. One marble is taken out. What is the probability of drawing a red marble.

 A

1/3.

 B

5/12.

 C

1/4.

 D

4/9.

Soln.
Ans: a

Total ways of drawing a marble = 4 + 5 + 3 = 12. Of these red marble can be drawn in 4 ways. So required probability = 4/12 = 1/3.


Question 3

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

 A

${364/365}$.

 B

$21/365$.

 C

$365/365$.

 D

$369/365$.

Soln.
Ans: a

The birthday of second friend has 365 outcomes. If it is not to match the birthday of the first friend, the number of favorable outcomes is 365 - 1 = 364. So probability is 364/365.


Question 4

A piggy bank contains 28 nos. of 50-paise coins, 59 nos. of 1-rupee coins and 76 nos. of 2-rupee coins. The piggy bank is turned upside down, and one coin falls down. What is the probability that it is a 50-paise coin?

 A

${28/163}$.

 B

$76/163$.

 C

$29/163$.

 D

$33/163$.

Soln.
Ans: a

Out of the total number of coins = 163, the chances favoring 50-paise coin are 28. So the probability is 28/163 = ${28/163}$.


Question 5

Two friends were born on non-leap years. What is the chance that their birthdays do not fall on the same day and month of the year?

 A

${364/365}$.

 B

$21/365$.

 C

$365/365$.

 D

$369/365$.

Soln.
Ans: a

The birthday of second friend has 365 outcomes. If it is not to match the birthday of the first friend, the number of favorable outcomes is 365 - 1 = 364. So probability is 364/365.


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This Blog Post/Article "Probability Quiz Set 003" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-05-17.

Posted by Parveen(Hoven),
Aptitude Trainer


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