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.

I alone sufficient while II alone not sufficient to answer

II alone sufficient while I alone not sufficient to answer

Either I or II alone sufficient to answer

Both I and II are not sufficient to answer

The average age of P, Q, R, and S is 30 years. How old is R?I. The sum

1.	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
Answer» E.

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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.

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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.