Which of the following events is certain? MCQ with Answer and Explanation

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Which of the following events is certain?

A. Getting a tail when a coin is tossed

B. Getting a number less than 7 on rolling a die

C. Getting a head on two tosses of a coin

D. Getting a 7 on rolling a die

Answer: Option B

Solution (By JKSSB Mock Tests)

All faces of a die are less than 7, so this event is certain.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

Harmonic mean is used to average speeds when:

A. Speeds are constant

B. Times traveled are equal

C. Data is qualitative

D. Distances traveled are equal

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Correct Answer: Option D

Explanation:
For equal distances, average speed = total distance / total time = harmonic mean of speeds; arithmetic mean would overestimate if speeds vary.

This question belongs to: Accountancy and Statistics Statistics

Question #2

In a frequency distribution, the number of observations falling in a class is called:

A. Class mark

B. Class limit

C. Class frequency

D. Class width

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Correct Answer: Option C

Explanation:
Class frequency is the count of data points within a particular class interval.

This question belongs to: Accountancy and Statistics Statistics

Question #3

If NRR equals 1, the population is said to be:

A. Declining

B. Exactly replacing itself

C. Growing rapidly

D. Migrating

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Correct Answer: Option B

Explanation:
NRR = 1 implies each generation replaces itself exactly.

This question belongs to: Accountancy and Statistics Statistics

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