A bag contains 3 red, 5 black balls. Two balls are drawn at random. The probability that they are of different colors is: MCQ with Answer and Explanation

Question

A bag contains 3 red, 5 black balls. Two balls are drawn at random. The probability that they are of different colors is:

A. 15/56

B. 1/2

C. 15/28

D. 3/8

Answer: Option C

Solution (By JKSSB Mock Tests)

Total ways C(8,2)=28. 1 red 1 black = 3×5=15. Probability=15/28.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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For two positive numbers, the arithmetic mean is 25 and geometric mean is 20. The harmonic mean is:

A. 15

B. 22.5

C. 18

D. 16

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Correct Answer: Option D

Explanation:
For two numbers, HM = GM² / AM = (20)² / 25 = 400/25 = 16.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The Paasche index is weighted by:

A. Fixed weights

B. Base period quantities

C. Current period quantities

D. Base period prices

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Correct Answer: Option C

Explanation:
Paasche price index uses current quantities as weights.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The census in India is conducted every:

A. 7 years

B. 10 years

C. 5 years

D. 12 years

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Correct Answer: Option B

Explanation:
India’s decennial census occurs every 10 years.

This question belongs to: Accountancy and Statistics Statistics

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