The class midpoint is also known as: MCQ with Answer and Explanation

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The class midpoint is also known as:

A. Class interval

B. Class frequency

C. Class limit

D. Class mark

Answer: Option D

Solution (By JKSSB Mock Tests)

Class mark = (lower limit + upper limit)/2.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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According to the Census of India 2011, the child sex ratio (0-6 years) was:

A. 940

B. 943

C. 900

D. 919

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Correct Answer: Option D

Explanation:
Child sex ratio (0-6) was 919 females per 1000 males, lower than overall sex ratio.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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A box contains 4 white and 2 black balls. Two balls are drawn successively with replacement. Probability both are white is:

A. 1/9

B. 4/9

C. 2/3

D. 5/9

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Correct Answer: Option B

Explanation:
With replacement: P(WW) = (4/6)×(4/6) = 16/36 = 4/9.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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A card is drawn from a pack of 52 cards. The probability that it is a king or a queen is:

A. 4/13

B. 2/13

C. 1/26

D. 1/13

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Correct Answer: Option B

Explanation:
4 kings + 4 queens = 8 favorable. Probability = 8/52 = 2/13.

This question belongs to: Accountancy and Statistics Statistics

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