Probability Quiz Set 013 | Maths Aptitude Quiz Questions and Mock Test on Probability Set 13 | mock tests for Bank PO, SSC Exams, SO Clerical Exam, GATE Exam, LIC AO, GIC AO, etc.

**Your Score**
Correct Answers:
Wrong Answers:
Unattempted:

Question 1

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.

1/3.

5/12.

1/4.

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.

Solution | Discuss! | Chapters»

Question 2

49 defective pens are accidentally mixed with 84 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?

${7/19}$.

$51/133$.

$8/133$.

$12/133$.

Soln.
Ans: a

Out of the total number of pens = 133, the chances favoring defective pen are 49. So the probability is 49/133 = ${7/19}$.

Solution | Discuss! | Chapters»

Question 3

From a deck of 52 cards 1 card is drawn at random. What is the probability that it will be a red "8"?

${1/26}$.

$6/8$.

$2/26$.

$6/26$.

Soln.
Ans: a

Number of ways of drawing 1 card = 52. There are two red "8" in the whole pack. So favorable chances are 2. Probability = 2/52 = 1/26.

Solution | Discuss! | Chapters»

Question 4

A box contains 7 navy, 2 khaki and 3 orange balls. What is the probability of drawing a ball that is neither khaki nor navy?

${1/4}$.

$4/12$.

$2/66$.

$6/66$.

Soln.
Ans: a

Total number of marbles is 12. We have to basically find the probability of picking a orange ball, for which 3 chances are favorable. So probability = 3/12 = ${1/4}$.

Solution | Discuss! | Chapters»

Question 5

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

${2/9}$.

$3/9$.

$4/9$.

$7/9$.

Soln.
Ans: a

Chances favoring a ball are 2, whereas the total chances are 9. The probability is 2/9 = ${2/9}$.

Solution | Discuss! | Chapters»