For independent events A and B with P(A)=0.3, P(B)=0.4, the probability that at least one of them occurs is: MCQ with Answer and Explanation

For independent events A and B with P(A)=0.3, P(B)=0.4, the probability that at least one of them occurs is:

A. 0.70

B. 0.58

C. 0.12

D. 0.82

Answer: Option B

P(A∪B)=0.3+0.4-0.3×0.4=0.7-0.12=0.58.

This question belongs to: Accountancy and Statistics Statistics

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

Question #1 Report Error

If the mean of 10 numbers is 15, and one number is removed making the new mean 14, the removed number is:

A. 14

B. 15

C. 24

D. 20

Correct Answer: Option C

Explanation:
Sum initially 150, after removal sum=9×14=126, removed = 150-126=24.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

Neonatal Mortality Rate relates to deaths of infants occurring within:

A. The first 24 hours of life

B. The first 28 days of life

C. The first 7 days of life

D. The first year of life

Correct Answer: Option B

Explanation:
Neonatal deaths are those occurring in the first 28 days (or 4 weeks) after birth.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

If P(A)=0.4, P(B)=0.3, and A, B are mutually exclusive, then P(A∪B) is:

A. 0.1

B. 0.58

C. 0.7

D. 0.12

Correct Answer: Option C

Explanation:
P(A∪B) = P(A)+P(B) = 0.4+0.3=0.7.

This question belongs to: Accountancy and Statistics Statistics