If a fair coin is tossed three times, the probability of exactly two heads is: MCQ with Answer and Explanation

Question

Share Report Error

If a fair coin is tossed three times, the probability of exactly two heads is:

A. 1/4

B. 5/8

C. 1/2

D. 3/8

Answer: Option D

Solution (By JKSSB Mock Tests)

Number of ways: C(3,2)=3; each sequence probability (1/2)³; total 3/8.

This question belongs to: Accountancy and Statistics Statistics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Statistics Questions

Question #1

Share Report

If P(A)=0.7, P(B)=0.6, and the maximum possible value of P(A∩B) is 0.6, then the minimum possible value of P(A∪B) is:

A. 1.0

B. 0.8

C. 0.7

D. 0.6

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option C

Explanation:
P(A∪B) = P(A)+P(B)-P(A∩B). To minimize union, maximize intersection: max=0.6. So min union = 0.7+0.6-0.6=0.7.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Share Report

The median is the best measure of central tendency when:

A. All values are equal

B. Data are symmetric

C. Data have extreme outliers

D. Data are qualitative

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option C

Explanation:
Median is robust to outliers, unlike mean.

This question belongs to: Accountancy and Statistics Statistics

Question #3

Share Report

If TFR = 3.0 and the proportion of female births is 0.49, GRR is:

A. 3.0

B. 0.49

C. 1.47

D. 1.53

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option C

Explanation:
GRR = TFR × (female birth proportion) = 3.0 × 0.49 = 1.47 daughters per woman.

This question belongs to: Accountancy and Statistics Statistics

Explore All Statistics MCQs