General Aptitude - 23.2 Problems on Ages - Data Sufficiency 1 Free Online Tests | Mock Tests | Preparation | Practice Tests

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What is Sonia's present age?
I.	Sonia's present age is five times Deepak's present age.
II.	Five years ago her age was twenty-five times Deepak's age at that time.

A. I alone sufficient while II alone not sufficient to answer

B. II alone sufficient while I alone not sufficient to answer

C. Both I and II are not sufficient to answer

D. Both I and II are necessary to answer

E. None of the above

View Answer

Correct choice: D

Explanation:

I. S = 5D ⇒D =	S	....(i)
	5

II. S - 5 = 25 (D - 5) ⇔S = 25D - 120 ....(ii)

Using (i) in (ii), we get S =		25 x	S		- 120
			5

⇒ 4S = 120.

⇒ S = 30.

Thus, I and II both together give the answer. So, correct answer is (E).

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