Mathematics (Average গড়)

1) The average salary of all the workers in
a workshop is  ₹ 8000. The average salary
of 7 technicians is  ₹ 12000 and the
average salary of the rest is  ₹6000. The
total number of workers in the workshop
is

2) The average ages of boys and girls in a class is 14.5 years and 15 years respectively. If the ratio of the
number of boys and girls is 2 : 3, then whatis the average age(in years) of all students in the class?

3) A motorist travels to a place 150 km
away at an average speed of 50 km/h and
returns at 30 km/h. What is the average
speed for the whole journey?

4) A shopkeeper has a sale of Rs. 6,435, Rs. 6,855, Rs. 7,230, Rs. 6,927 and Rs. 6,562 for five
consecutive months. How much sale (in Rs.) must it make in the sixth month so that it gets an
average sale of Rs. 6,500 ?

5) The average salary per head of all workers of an' institution is  ₹ 60. The average salary per head of 12 officers is  ₹ 400. The average salary per head of the rest is  ₹ 56.  T'hen, the total number of workers in the institution is

6) The average of 15 numbers is 56. The average of first 8 numbers is 54.4 and that of last 8 numbers is
56.6. If number is excluded then what is the average of the remaining numbers? (correct to one
decimal place)

7) The average of 41 numbers is 63. The average of first 21 number is 61.5 and that of last 21 numbers is
65.5. if number is excluded then the average of remaining numbers is

8) Que. 32 Find the average number of employees working in companies A, B, D and E.

9) Roshan bought 5 pants at 25 each,
10 shirts at 50 each and 15 ties at ? 35
each. Find the average price of all the
articles.

10) A businessman purchased 30 TV sets in
₹ 300000, If the average cost of 15 TV
sets is  ₹ 9000, then find out the average
cost of remaining TV sets.