Three dice are rolled. The probability of getting a sum of 5 is: MCQ with Answer and Explanation

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Three dice are rolled. The probability of getting a sum of 5 is:

A. 15/216

B. 1/36

C. 5/216

D. 10/216

Answer: Option B

Solution (By JKSSB Mock Tests)

Combinations: (1,1,3) and (1,2,2) each with 3 permutations, total 6 favorable. 6/216 = 1/36.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the mean of a set of 10 observations is 20, and 5 is added to each observation, what will be the new mean?

A. 25

B. 100

C. 15

D. 20

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Correct Answer: Option A

Explanation:
The arithmetic mean is affected by the change of origin. If a constant is added to all observations, the mean increases by that constant.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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For given data Σp₁q₀=480, Σp₀q₀=400, Σp₁q₁=600, Σp₀q₁=500. Fisher's index is:

A. 124.9

B. 120.0

C. 122.5

D. 121.0

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Correct Answer: Option B

Explanation:
Laspeyres = 480/400×100=120; Paasche = 600/500×100=120; Fisher = √(120×120) = 120.

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Question #3

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Which measure of central tendency can be determined graphically from an ogive?

A. Mode

B. Mean

C. Geometric mean

D. Median

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Correct Answer: Option D

Explanation:
Median is the x-value corresponding to cumulative frequency N/2 on the ogive.

This question belongs to: Accountancy and Statistics Statistics

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