Question (49/66)
A family consists of grandparents, parents and 3 grandchildren. The average age of the grandparents is 67 years, that of parents is 35 years and that of the grandchildren is 6 years. What is average age of entire family ?(A) 222/7
(B) 200/7
(C) 225/7
(D) None of these
Question (50/66)
The average annual income of certain agricultural workers is A and that of other workers is B. The number of agricultural workers is 11 times that of other workers. What is the average monthly income of all the workers ?(A) (A + B)/2
(B) (A + 11B)/12
(C) (1 + B)/11A
(D) (11A + B)/12