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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.
Q:
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.
- 1I alone sufficient while II alone not sufficient to answerfalse
- 2II alone sufficient while I alone not sufficient to answerfalse
- 3Either I or II alone sufficient to answerfalse
- 4Both I and II are not sufficient to answertrue
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