- 11
- 13
- 16
- 19
- c
-
Total Numbers=10
Incorrect Average=15
By mistake students read 26 instead of 36
Sum of All Averages=10*15=150
Correct Calculation=Incorrect Sum + Correct Sum-Incorrect Number
Correct Calculation=150+36-26=160
Correct Average=160/10=16
All Testing Services Solved Papers
A man buys a bike for Rs.80,000/- and sells for Rs.88,000/- the profit in percentage is _____
- 10
- 12
- 14.6
- 18.2
- a
-
Purchase Price=80,000
Sale Price=88000
Profit=88000-80000=8000
Profit %=Profit / Cost *100
Profit %=8000/80000*100
Profit %=10%
The average of all even numbers up to 100 is _____
- 47
- 51
- 55
- 59
- b
-
Even Numbers upto 100=2,4,6,8,………,100
Average of Even numbers=(First Number + Last Number) / 2
Average of Even numbers=(2+100)/2=102/2=51
A boy is cutting a rectangular lawn 40 ft long and 30 ft wide. He has cut all of it except for a rectangle that is 20 ft long and 15 ft wide. The fraction part of the lawn remains uncut _____
- 1/4
- 2/5
- 2/125
- 3/125
- a
-
Area of Lawn=40*30=1200ft
Uncut Part of the Lawn=20*15=300ft
Fraction Part of the Lawn=300/1200=1/4
You can write as 1/4 or 25%.
At an educational trip of academy to Islamabad, ratio of boys to girls was 4:5. The number of students on the trip is:
- 70
- 80
- 90
- 100
- c
-
Ratio between boys & girls=4:
Sum of Ratios=4+5=9
Easily divisible answer is=90
Number of boys=4/9*90=40
Number of Girls=5/9*90=50
Total Students on Trip=40+50=90
15 men hired to plough a piece of land in 10 days. To complete the same job in three days more number of men is required:
- 35
- 40
- 50
- 55
- a
-
No of Men=15
No of Days=10
Total Time(hr)=15*10=150
Men requited to complete=150/3=50
More Requited to do same job in 3 days=50-15=35
Ahmed spent 2/3 of his saving on a used car and he spent ¼ of his remaining saving on a new carpet. If the carpet costs him Rs.250 then the amount spent by him on the car is:
- 2000
- 3000
- 3500
- 4000
- a
-
Total Saving= x
Spent on Car=2/3(x)
Remaining Amount=X-2/3(x) =(3x-2X) / 3=X/3
Carpet= 1/4 of remaining amount
=1/4*X/3=X/12
Amount of Carpet=250
X/3=250
X=250*12=3000
Amount spent on Car=2/3(X)
2/3 (3000)=6000/3000=2000
The amount spend on car=2000
In Math there are 60 problems which were to be done in 1 hour. A student completes 30 problems in 20 minutes, the average time in seconds for completing each of the remaining problem is:
- 70
- 80
- 90
- 98
- b
-
Total Problems=60
A Student completes 30 Problems in 20 minutes
Remaining Problems=60-30=30
Ramingining Time=60-20=40
30 Problems solved=40 minutes
01 Problem solved=40/30*60=80 Seconds
The average of 5 numbers is 13. If the average of 4 of these numbers is 10, then fifth number is _____
- 25
- 35
- 40
- 45
- a
-
Average of 4 numbers=10 (40/4=10)
Average of 5 numbers=13 (65/5=13)
Difference of sum=65-40=25
Fifth number=25
If f(x)=3x-3 then _____
- f(1)=2
- f(1)=1
- f(1)=0
- f(1)=3
- c