The average age of P, Q, R, and S is 30 years. How old is R? Statement I - The sum of ages of P and R is 60 years. Statement II - S is 10 years younger than R.
Which of the five trains A, B, C, D and E is the best? Statement I - D train is better than E train, A train and C train but not as good as B train. Statement II - D train is better than C train but not as good as B which is better than E train.