Assertion (A): The arithmetic mean of a set of positive numbers is always greater than or equal to the geometric mean. Reason (R): AM ≥ GM for any set of non-negative numbers, and equality holds when all numbers are equal. Choose the correct option: MCQ with Answer and Explanation
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Question #1
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In attributes, if (A)=70, (B)=50, (αβ)=10, and N=100, then (AB) is:
Correct Answer: Option B
Explanation:
(αβ)= N - (A) - (B) + (AB) ⇒ 10 = 100 -70 -50 + (AB) ⇒ (AB)=30.
(αβ)= N - (A) - (B) + (AB) ⇒ 10 = 100 -70 -50 + (AB) ⇒ (AB)=30.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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A speaks truth in 70% cases, B in 80% cases. In what percentage of cases are they likely to contradict each other in stating the same fact?
Correct Answer: Option C
Explanation:
Contradiction = P(A truth and B lie) + P(A lie and B truth) = 0.7×0.2 + 0.3×0.8 = 0.14+0.24=0.38=38%.
Contradiction = P(A truth and B lie) + P(A lie and B truth) = 0.7×0.2 + 0.3×0.8 = 0.14+0.24=0.38=38%.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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Life expectancy at birth is computed using:
Correct Answer: Option C
Explanation:
Life table synthesizes age-specific mortality rates to compute life expectancy.
Life table synthesizes age-specific mortality rates to compute life expectancy.
This question belongs to:
Accountancy and Statistics
Statistics
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