model 7 average on ages/weight Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

The average age of a husband and his wife was 23 years at the beginning of their marriage. After five years they have a one-year old child. The average age of the family of three, when the child was born, was

a) 24 years

b) 23 years

c) 20 years

d) 18 years

Question : 2

5 years ago, the average age of P and Q was 15 years. Average age of P, Q and R today is 20 years. How old will R be after 10 years?

a) 40 years

b) 35 years

c) 50 years

d) 30 years

Question : 3

In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son ?

a) 11 years

b) 12 years

c) 10 years

d) 10.5 years

Question : 4

The average age of 24 boys and their teacher is 15 years. When the teacher’s age is excluded, the average age decreases by 1 year. The age of the teacher is

a) 39 years

b) 38 years

c) 41 years

d) 40 years

Question : 5

The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are replaced by two new players. The average age of the new players is

a) 19 years 6 months

b) 19 years 1 month

c) 19 years 5 months

d) 19 years 11 months