# Probability Quiz Set 006

### Question 1

What is the probability of getting a sum of 2 from two throws of a dice?

A

1/18.

B

1/3.

C

2/3.

D

1/6.

Soln.
Ans: a

Total outcomes = 36. Favorable are 2, which are: (1, 1), (1, 1). Probability = 2/36 = 1/18.

### Question 2

There are 40 students in Class X of a school of whom 25 are girls and 15 are boys. If one student is absent today, what is the probability that it is a girl?

A

5/8.

B

3/8.

C

1/2.

D

3/10.

Soln.
Ans: a

Outcomes favoring a girl are 25, so the probability is 25/40 = 5/8.

### Question 3

A class has 5 boys and 3 girls. What is the probability of choosing 1 boy and 2 girls?

A

\${15/56}\$.

B

\$6/8\$.

C

\$16/56\$.

D

\$20/56\$.

Soln.
Ans: a

Three students have to be picked. Total number of ways = 8C3 = \${8 × 7 × 6}/{3 × 2 × 1} = \$56. Number of ways of picking 1 boy and 2 girls = 5C1 × 3C2 = 15. So probability = \$15/56\$ = \${15/56}\$.

### Question 4

What is the probability of getting a sum of 13 from two throws of a dice?

A

0.

B

1/3.

C

2/3.

D

1/6.

Soln.
Ans: a

Total outcomes = 36. Favorable are 0 because maximum sum possible is 6 + 6 = 12. So probability = 0.

### Question 5

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

\$9/11\$.

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.

This Blog Post/Article "Probability Quiz Set 006" 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