**QUIZ 3 MATHS**

**The average age of 24 students and the principal is 15 years. When the principal’s age is excluded, the average age decreases by 1 year. What is the age of the principal?**

1) 38 2) 40 3) 39 4) 37 5) None of these

**Three years ago, the average age of***A,B and C*was 27 years and that of*B*and*C*5 years ago was 20 years*A’*s present age is

1) 30 Years 2) 35 Years 3) 40 Years 4) 48 Years 5) None of these

**Ajit Tendulkar has a certain average for 9 innings. In the tenth inning, he scores 100 runs thereby increasing his average by 8 runs. His new average is**

1) 20 2) 24 3) 28 4) 32 5) None of these

**The average age of a family of 6 members is 22 years. If the age of the youngest**

**member be 7 years, what was the average age of the family at the birth of the**

**youngest member?**

1) 15 2) 18 3) 21 4) 12 5) None of these

**The average age of 8 persons in a committee is increased by 2 years when two men aged 35 years and 45 years are substituted by two women. Find the average age of the two women.**

1) 48 2) 45 3) 51 4) 42 5) None of these

**The average weight of a class of 29 students is 40 kg. if the weight of the teacher**be**included, the average rises by 500 gm. What is the weight of the teacher?**

1) 40.5 kg 2) 50.5 kg 3) 45 kg 4) 55 kg 5) None of these

**The age of Shaurya and Kauravki is in the ratio 2:6. After 5 years, the ratio of their ages will become 6:8. Find the average of their ages after 10 years.**

**8.If we take four numbers, the average of the first three is 16 and that of the last**

**three is 15. If the last number is 18, the first number is**

1) 20 2) 21 3) 23 4) 25 5) None of these

**The average of ten numbers is 7. If each number is multiplied by 12, then the**

**average of the new set of number is**

1) 7 2) 19 3) 82 4) 84 5) None of these

**The average weight of 5 men is decreased by 3 kg when one of them weighing 150 kg is replaced by another person. Find the weight of the new person.**

1) 165 kg 2) 135 kg 3) 138 kg 4) 162 kg 5) None of these

**ANSWERS**

*1.3 2.3 3.3 4.2 5.1 6.4 7.1 8.2 9.4 10.2*