What is the sum of the ages of P, Q and R ?
I) Q's age is one half of the average of P,Q and R's ages
II) P's age is twice the average age of P,Q and R

A

if the statement I alone is sufficient to answer the question.

B

if the statement II alone is sufficient to answer the question.

C

if both the statements I and II are sufficient to answer the question but neither statement alone is sufficient.

D

if both the statements I and II together are not sufficient to answer the question and additional data is required.