Online Preparation-Average-Part2

Solve the questions

1.   Average age of 8 members of committee is 40 year. A member whose age is 55 year is retired and his place was taken by another member whose age is 39 year. Calculate the present age of the committee?

2.   Average age of 14 students in a group is 19 years. A teacher enters in the group which the average age is increased by 3 years calculate the age of teacher?

3.  Average rate of 31 students in a group is 14.6 kg. A teacher enters the group whose average weight is increased by 250 grams. Calculate the weight of the teacher?

4.  Average marks of 50 students in a group are 40. After rechecking it was found that the marks of 2 students is 45 and 55 is wrong taken as 40 and 50. Calculate the correct average?

5.    Average weight of 40 students in a group is 53.5kg. one boy left  the group & new one enters the group which the average weight increased by 250gm. Calculate the weight of boy who entered the group?

6. Average temperature of Sunday, Monday and Tuesday is 23˚C, while the average temperature of Monday, Tuesday and Wednesday is 27˚C, if the temperature of Wednesday is 40˚C then calculate the temperature of Sunday?

7.  Average temperature of Sunday, Monday, Tuesday and Wednesday is 31˚C. while the average temperature  of Monday, Tuesday, Wednesday and Thursday is 29˚C, if the temperature of Thursday is 41˚C. Than calculate the temperature of Sunday?

8.  Average weight of 200 boys is 53.5kg. 100 new boys enter the group which the average weight is increased by 3 kg. Calculate the average weight of 100 new boys?

9.   Average weight of 100 new boys of a group is 61 kg. 50 new boys enter the group. Which the average weight is increased by 4. Calculate the average of 50 new boys?

10. A man goes house to office at the speed of 15km/Hours and he returned back at the speed of 25km/hr. calculate his average speed?

11. Fine the average of 1²+2²+3²+4²+5²?

12. Average of 7 numbers are11.if 3 is added in all the numbers. Find the new average?

13. Find the average of first 5 multiples of 7?

14. In a school the average age of 40 students are 20. 10 new students join the class and because of these 10 students average becomes 22. Find the average age of new students?