If P(A)=0.4, P(B)=0.5, and P(A∩B)=0.2, then P(A'∩B') is: MCQ with Answer and Explanation

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If P(A)=0.4, P(B)=0.5, and P(A∩B)=0.2, then P(A'∩B') is:

A. 0.3

B. 0.1

C. 0.5

D. 0.7

Answer: Option A

Solution (By JKSSB Mock Tests)

P(A∪B)=0.4+0.5-0.2=0.7. P(A'∩B')=1-0.7=0.3.

This question belongs to: Accountancy and Statistics Statistics

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A preliminary test of a questionnaire on a small subset of the population before the main survey is called:

A. Pre-testing or Pilot Survey

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Correct Answer: Option A

Explanation:
A pilot survey helps in identifying shortcomings in the questionnaire design before full-scale implementation.

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Infant Mortality Rate (IMR) measures the number of deaths of infants under the age of:

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Correct Answer: Option A

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