The sample space for tossing three coins is: MCQ with Answer and Explanation

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The sample space for tossing three coins is:

A. 2 outcomes

B. 8 outcomes

C. 4 outcomes

D. 6 outcomes

Answer: Option B

Solution (By JKSSB Mock Tests)

Three independent coins yield 2³ = 8 possible sequences.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the number of observations possessing A is 70, B is 60, and AB is 50, then the number possessing neither is 20. The data are:

A. Independent

B. Inconsistent

C. Complete association

D. Consistent

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Correct Answer: Option D

Explanation:
Check all ultimate classes: (AB)=50, (Aβ)=70-50=20, (αB)=60-50=10, (αβ)=20. Sum=50+20+10+20=100, all non-negative. Consistent.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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A frequency polygon is a graph of:

A. Class frequencies against class midpoints

B. Cumulative frequencies

C. Class boundaries against frequencies

D. Class limits against frequencies

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Correct Answer: Option A

Explanation:
A frequency polygon plots class midpoints on the x‑axis and class frequencies on the y‑axis and joins them by straight lines.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Total Fertility Rate (TFR) of 2.5 indicates that, on average, women are having:

A. 2.5 children

B. 2.5 times the replacement level

C. 2.5 births per year

D. 2.5 daughters

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Correct Answer: Option A

Explanation:
TFR estimates the average number of children a woman would have over her lifetime if she experienced current age-specific fertility rates; TFR=2.5 means 2.5 children per woman.

This question belongs to: Accountancy and Statistics Statistics

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