A car travels 60 km/h for the first half of a distance and 40 km/h for the second half. The average speed (km/h) is: MCQ with Answer and Explanation
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Question #1
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An event that cannot happen is called:
Correct Answer: Option B
Explanation:
An impossible event has probability 0.
An impossible event has probability 0.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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For two independent events A and B, P(A)=0.2, P(B)=0.5. P(A∪B) is:
Correct Answer: Option A
Explanation:
P(A∪B) = 0.2+0.5 - (0.2×0.5) = 0.7 - 0.1 = 0.6.
P(A∪B) = 0.2+0.5 - (0.2×0.5) = 0.7 - 0.1 = 0.6.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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Which of the following is a method of collecting primary data?
Correct Answer: Option D
Explanation:
Schedules filled by enumerators is a primary data collection method; the others are secondary sources.
Schedules filled by enumerators is a primary data collection method; the others are secondary sources.
This question belongs to:
Accountancy and Statistics
Statistics
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