A bag contains 5 white and 3 black balls. If one ball is drawn, the probability it is black is: MCQ with Answer and Explanation

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A bag contains 5 white and 3 black balls. If one ball is drawn, the probability it is black is:

A. 3/8

B. 3/5

C. 1/8

D. 5/8

Answer: Option A

Solution (By JKSSB Mock Tests)

Total balls = 8. Favorable outcomes (black) = 3. Probability = 3/8.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The process of arranging data into groups on the basis of common characteristics is called:

A. Editing

B. Analysis

C. Tabulation

D. Classification

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Correct Answer: Option D

Explanation:
Classification groups homogeneous data into categories based on similarities.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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A coin is tossed twice. The probability of getting at least one head is:

A. 1

B. 1/2

C. 3/4

D. 1/4

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Correct Answer: Option C

Explanation:
All outcomes except TT (1/4). So 1 - 1/4 = 3/4.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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In a continuous frequency distribution, the class interval '10-20' means the class includes:

A. Only the values 10 and 20

B. Values from 10 up to but not including 20 (in an exclusive series)

C. Values from 10 up to exactly 20

D. Values greater than 20

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Correct Answer: Option B

Explanation:
In standard exclusive class intervals, the lower limit is included, but the upper limit is excluded and falls into the next class.

This question belongs to: Accountancy and Statistics Statistics

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