A bag contains 4 white and 6 black balls. Two balls are drawn at random. Probability they are of different colors is: MCQ with Answer and Explanation
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Question #1
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Maternal Mortality Ratio is expressed per 100,000 live births primarily to:
Correct Answer: Option D
Explanation:
Maternal deaths are relatively rare; using a base of 100,000 live births yields manageable numbers (e.g., 100-500) instead of tiny decimals (0.001-0.005), enhancing readability and comparison.
Maternal deaths are relatively rare; using a base of 100,000 live births yields manageable numbers (e.g., 100-500) instead of tiny decimals (0.001-0.005), enhancing readability and comparison.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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The combined mean of two groups with n₁=20, mean₁=50 and n₂=30, mean₂=60 is:
Correct Answer: Option B
Explanation:
Combined mean = (20×50 + 30×60) / (20+30) = (1000+1800)/50 = 2800/50 = 56.
Combined mean = (20×50 + 30×60) / (20+30) = (1000+1800)/50 = 2800/50 = 56.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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The stub of a table contains:
Correct Answer: Option D
Explanation:
The stub is the left‑most part of a table containing the row captions.
The stub is the left‑most part of a table containing the row captions.
This question belongs to:
Accountancy and Statistics
Statistics
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