Probability Quiz Set 015

Advertisement


Your Score
Correct Answers:
Wrong Answers:
Unattempted:

Question 1

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?

 A

${2/9}$.

 B

$3/9$.

 C

$4/9$.

 D

$7/9$.

Soln.
Ans: a

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


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?

 A

${7/19}$.

 B

$51/133$.

 C

$8/133$.

 D

$12/133$.

Soln.
Ans: a

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


Question 3

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

 A

0.41.

 B

0.59.

 C

0.5.

 D

0.25.

Soln.
Ans: a

P(E) + P(non-occurrence of E) is always = 1. So P(non-occurrence of E) = 1 - P(E) = 0.41.


Question 4

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

 A

${1/26}$.

 B

$6/8$.

 C

$2/26$.

 D

$6/26$.

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.


Question 5

A piggy bank contains 88 nos. of 50-paise coins, 37 nos. of 1-rupee coins and 34 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

${88/159}$.

 B

$34/159$.

 C

$89/159$.

 D

$93/159$.

Soln.
Ans: a

Out of the total number of coins = 159, the chances favoring 50-paise coin are 88. So the probability is 88/159 = ${88/159}$.


buy aptitude video tutorials


Creative Commons License
This Blog Post/Article "Probability Quiz Set 015" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-04-07.

Posted by Parveen(Hoven),
Aptitude Trainer


Advertisement