The age of five members of a family are 42, 49, 56, 63 and 35 years.Find their average age

The average age of 7 members of Patel's family is 25 years. The average age of the same family 3 years ago was :

The average age of 7 members of a family is 40 years. In the family, there are three men, three women and one boy. If the average age of three men is 48 years and average age of three women is 44 years, then the age of boy is:

The present average age of family of four members is 36 years . If the present age of the youngest member of family be 12 years , the average age of the family at the birth of the youngest number was

After replacing an old member by a new member,it was found that the average age of five members of a club is the same as it was 3 years ago.What is the difference between the ages of the replaced and the new member? (a) 2 years (b) 4 years (c)8 years (d)15 years

The average age of 6 members of a family is 20 years. If the age of the servant is included, the average age increases by 25% . What is the age (in years) of the servant ?