If a fair die is rolled twice, the probability that the first roll is a 4 and the second roll is a 5 is: MCQ with Answer and Explanation

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If a fair die is rolled twice, the probability that the first roll is a 4 and the second roll is a 5 is:

A. 1/6

B. 1/18

C. 1/36

D. 1/12

Answer: Option C

Solution (By JKSSB Mock Tests)

Independent events: (1/6)×(1/6)=1/36.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

The Harmonic Mean of 2 and 4 is:

A. 3.5

B. 2.83

C. 3

D. 2.67

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Correct Answer: Option D

Explanation:
HM = 2ab / (a+b) = 2(2)(4) / (2+4) = 16/6 = 2.67.

This question belongs to: Accountancy and Statistics Statistics

Question #2

The geometric mean is most appropriate for averaging:

A. Income levels

B. Price ratios and growth rates

C. Test scores

D. Heights

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Correct Answer: Option B

Explanation:
Geometric mean is suitable for averaging ratios and percentage changes because it accounts for compounding.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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

A. 1/2

B. 15/56

C. 15/28

D. 3/8

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Correct Answer: Option C

Explanation:
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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