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Quantitative Aptitude - Average Questions - 02


1. 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 ?


2. The average age of 3 children in a family is 20 % of the average age of the father and the eldest child. The total age of the mother and the youngest child is 39 years. Ifthe father's age is 26 years, what is the age of second child ?


3. The total of the present ages of P, Q, R and S is 96 years. To find out Q's present age, which of the following informations given in statements A and B is/are sufficient ? A. The average age of P, Q and S is 20 years. B. The average age of R and S is 25 years.


4. The average weight of 29 students of 50 balls is 2 lbs. If the weight of the container be included, the average weight will increase by 0.05 lbs. The weight of the container is :


5. The average age of a committee of eight members is 40 years. A members aged 55 years retired and his place was taken by another member aged 39 years. The average age of the present committee is :



6. 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 :


7. The average weight of 6 men decreases by 3 kg when one of them weighing 80 kg is repalced by a new man is :


8. In a cricket eleven, the average of eleven players is 28 years. Out of these, the average ages of three groups of three players each are 25 years, 28 years and 30 years respectively. If in these groups, the captain and the youngest player are not included, and the captain is eleven years older than the youngest player, which is the age of the captai ?


9. The average age of a class is 15.8 years. The average age of the boys in the class is 16.4 years while that of the girls is 15.4 years. What is the ratio of boys to girls in the class ?


10. The mean temperature of Monday to Wednesday was 37C and of Tuesday to Thursday was 34C. If the temperature on Thursday was 4 / 5th that of Monday, the tempearture on Thursday was :


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