If the events A and B are independent, P(A)=0.4, P(B)=0.5, then P(A'∩B') is: MCQ with Answer and Explanation

If the events A and B are independent, P(A)=0.4, P(B)=0.5, then P(A'∩B') is:
A. 0.3
B. 0.9
C. 0.2
D. 0.5
Answer: Option A
Solution (By JKSSB Mock Tests)
P(A')=0.6, P(B')=0.5, independence gives 0.6×0.5=0.3.

Discuss this Question (0)

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

Practice More Statistics Questions

Question #1
Cost of Living Index is essentially the same as:
A. Consumer Price Index
B. Wholesale Price Index
C. Index of Industrial Production
D. Sensex

Correct Answer: Option A


Explanation:
Cost of Living Index measures changes in retail prices, i.e., CPI.

This question belongs to: Accountancy and Statistics Statistics
Question #2
A frequency distribution has classes 0-10, 10-20, 20-30, 30-40. The median class is 20-30 and the cumulative frequency before this class is 30. If N=80, frequency of median class is 20. The median is:
A. 26
B. 24
C. 25
D. 23

Correct Answer: Option C


Explanation:
Median = L + (N/2 - cf)/f × h = 20 + (40-30)/20 × 10 = 20 + 10/20×10 = 20 + 5 = 25.

This question belongs to: Accountancy and Statistics Statistics
Question #3
The geometric mean is suitable for averaging:
A. Normal test scores
B. Heights
C. Temperatures
D. Ratio data like growth rates

Correct Answer: Option D


Explanation:
GM is appropriate for averaging multiplicative changes over time.

This question belongs to: Accountancy and Statistics Statistics