General Aptitude - 7.2 Average - Data Sufficiency 1 Free Online Tests | Mock Tests | Preparation | Practice Tests

Goto

Take Exam

01 02 03

3 / 3

The average age of P, Q, R and S is 30 years. How old is R?
I.The sum of ages of P and R is 60 years
II.S is 10 years younger than R.

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

E. None of the above

View Answer

Correct choice: D

Explanation:

P + Q + R + S = (30 x 4) ⇒P + Q + R + S = 120 .... (i)

I. P + R = 60 .... (ii)

II. S = (R - 10) .... (iii)

From (i), (ii) and (iii), we cannot find R.

∴ Correct answer is (D)

3 / 3

Lessons