A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family? December 31, 2021December 31, 2021 administrator A. 28(4/7) yearsB. 31(5/7) yearsC. 32(1/7) yearsD. None of theseCheck AnswerB. 31(5/7) years Share the PostRelated Posts:A family consists of grandparents, parents and three…Three years ago the average age of a family of six…The average age of a husband and a wife is 23 years…The average age of 15 students of a class is 15…The average age of a husband, wife and their child 3…The average age of 8 men increases by 2 years when…