AVERAGE SOLVED PROBLEMS 1

1. 21

2. 20.5

3. 22

4. 22.5

20.5

The total age of all students is 400

3 more students of ages 23,24,25 join

so total age now is 400+23+24+25=472

so the average is 472/23=20.5

1. 36.5

2. 36

3. 38

4. 37

38

Total number of family members is 5

The total age of family is 30*5=150

Except the age of eldest child average is 28

so age of family now is 28*4=112

Age of eldest child is 150-112=38

1. 32 rupees

2. 20 rupees

3. 25 rupees

4. 45 rupees

45 rupees

Total objects is 10 and average cost is 25

the total cost is 25*10=250

Remove the rulers so ,total objects is 10-2=8

the average cost now is 20

total cost of all articles except rulers is 20*8=160

total cost- cost of other articles =cost of rulers

250-160=90

cost of 2 rulers is 90 and that of one ru

1. 10.5 feet

2. 7.5 feet

3. 8.5 feet

4. 5.5 feet

8.5 feet

Total students is 8 and average height is 4 feet

total height is 8*4=32 feet

Now when we add the height of the teacher the average height is 4.5 feet

height of teacher= total height with teacher height - total height before

8x4-9x4.5=8.5 feet

1. 190 rupees

2. 230 rupees

3. 225 rupees

4. 220 rupees

220 rupees

Total cost of normal tickets=20* no of tickets

20x20=400

total cost of tatkal tickets is 40x no of tickets

40x10=400

total number of tickets is 30

total cost of tickets is 400+400=80

removal of one ticket makes the average cost 20

total cost now is no of tickets * average cost

20x29(one ticket is re

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