The probability that a randomly chosen number from 1 to 100 is divisible by 7 or 11 is: MCQ with Answer and Explanation
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Question #1
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Given P(A)=0.4, P(B)=0.5, and A and B are mutually exclusive, P(A∪B) is:
Correct Answer: Option A
Explanation:
Mutually exclusive ⇒ P(A∪B) = P(A)+P(B) = 0.4+0.5=0.9.
Mutually exclusive ⇒ P(A∪B) = P(A)+P(B) = 0.4+0.5=0.9.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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The mean of a data set is 50 and the median is 52. Using the empirical relation, the approximate mode is:
Correct Answer: Option D
Explanation:
Mode ≈ 3Median - 2Mean = 3×52 - 2×50 = 156 - 100 = 56.
Mode ≈ 3Median - 2Mean = 3×52 - 2×50 = 156 - 100 = 56.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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Pre‑testing of a questionnaire means:
Correct Answer: Option D
Explanation:
Pre‑testing (pilot study) helps identify ambiguous or difficult questions before the main survey.
Pre‑testing (pilot study) helps identify ambiguous or difficult questions before the main survey.
This question belongs to:
Accountancy and Statistics
Statistics
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