The geometric mean of 2, 4, and 8 is: MCQ with Answer and Explanation

The geometric mean of 2, 4, and 8 is:
A. 3.76
B. 4
C. 5.33
D. 4.67
Answer: Option B
Solution (By JKSSB Mock Tests)
(2 × 4 × 8)^(1/3) = 64^(1/3) = 4.

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Practice More Statistics Questions

Question #1
Assertion (A): The geometric mean is always less than or equal to the arithmetic mean for the same dataset. Reason (R): This is a consequence of the AM-GM inequality in mathematics.
A. A is true but R is false
B. A is false but R is true
C. Both A and R are true, but R is not the correct explanation of A
D. Both A and R are true, and R is the correct explanation of A

Correct Answer: Option D


Explanation:
The AM-GM inequality states that for non-negative real numbers, the arithmetic mean is always greater than or equal to the geometric mean, with equality only when all values are identical.

This question belongs to: Accountancy and Statistics Statistics
Question #2
If P(A)=0.5, P(B)=0.4, and A and B are independent, P(A∩B) is:
A. 0.5
B. 0.1
C. 0.2
D. 0.9

Correct Answer: Option C


Explanation:
For independent events, P(A∩B) = P(A) × P(B) = 0.5 × 0.4 = 0.2.

This question belongs to: Accountancy and Statistics Statistics
Question #3
If A and B are independent, then P(A|B) equals:
A. P(B)
B. P(A) + P(B)
C. P(A)
D. P(A∩B)

Correct Answer: Option C


Explanation:
Independence means the occurrence of B does not affect the probability of A.

This question belongs to: Accountancy and Statistics Statistics