**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?

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