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. 15/28
B. 3/8
C. 15/56
D. 1/2
Answer: Option A
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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Practice More Statistics Questions

Question #1
In the theory of attributes, the total number of ultimate class frequencies for 'n' attributes is:
A. 3^n
B. 2^n
C. n^2
D. n!
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Correct Answer: Option B

Explanation:
For n attributes, each can be either present or absent, resulting in 2^n ultimate class frequencies.
This question belongs to: Accountancy and Statistics Statistics
Question #2
Which method is suitable when the informants are not literate?
A. Online survey
B. Telephonic interview
C. Mailed questionnaire
D. Direct personal interview
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Correct Answer: Option D

Explanation:
Direct personal interview enables the enumerator to explain questions and record answers accurately, especially for illiterate respondents.
This question belongs to: Accountancy and Statistics Statistics
Question #3
Which of the following is a quantitative classification?
A. Gender
B. Height in centimeters
C. Religion
D. Nationality
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Correct Answer: Option B

Explanation:
Height is a measurable quantity, hence quantitative classification.
This question belongs to: Accountancy and Statistics Statistics
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