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Average - Data Intensity 2 :: Discussion

3.	What is the average age of children in the class?
	A.	I alone sufficient while II alone not sufficient to answer
	B.	II alone sufficient while I alone not sufficient to answer
	C.	Either I or II alone sufficient to answer
	D.	Both I and II are not sufficient to answer

	Answer: Option D


	Explanation:
	Let there be x children. I gives, age of teacher = x years. II gives, average age of (x + 1) persons = (x + 1) years. Teacher's age = (x + 1) (x + 1) - x2 = (x2 + 1 + 2x) - x2 = (1 + 2x) Thus, teacher's age cannot be obtained. Correct answer is (D)



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Published by:Michael Daani

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