All types of Mathematics MCQs for PPSC, FPSC, NTS, and all government exam.
The mean mark of 30 students in a class is 58.5. Later on, it was found that 75 was wrongly recorded as 57. Find the correct ones.
A. 57.4
B. 57.5
C. 58.9
D. 59.1
Correct mean = 30x 58.5 -57 +75/30
= 1755+18/30 = 1773/30 = 59.1
A person travels from x to y at a speed of 40 km/h and returns by increasing his speed by 50%. What is his average speed for both trips?
A. 36km/h
B. 45km/h
C. 48km/h
D. 50km/h
Speed of person from x to y =40 km/h
Speed of person from y to x =(40×150)/100 = 60km/h
Since the distance travelled is the same
Therefore, Average Speed = (2x40x60)/40+60 = 48km/h
The average weight of A, B, and C is 45 kg. If the average weight of A and B is 40 kg and that of B and C is 43 kg, then the weight of B is___________?
A. 17 kg
B. 20 kg
C. 26 kg
D. 31 kg
Let A, B, C represent their respective weights. Then, we have: A + B + C = (45 x 3) = 135 …. (i) A + B = (40 x 2) = 80 …. (ii) B + C = (43 x 2) = 86 ….(iii) Adding (ii) and (iii), we get: A + 2B + C = 166 …. (iv) Subtracting (i) from (iv), we get : B = 31. B’s weight = 31 kg
The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
A. 47.55 kg
B. 48 kg
C. 48.55 kg
D. 49.25 kg
If the average marks of three batches of 55, 60, and 45 students respectively 50, 55, 60, then the average marks of all the students is__________?
A. 53.33
B. 54.68
C. 55
D. None of these
Required average = (55 x 50 + 60 x 55 + 45 x 60) / (55 + 60 + 45)
= (2750 + 3300 + 2700) /160
= 54.68 is correct Answer
What is the Sum of the First 70 Odd Numbers?
A. 4900
B. 4970
C. 4960
D. None of these
1 acre is equal to ________square foot?
A. 45434 square foot
B. 34343 square foot
C. 43572 square foot
D. 43560 square foot
Acre, the unit of land measurement in the British Imperial and United States Customary systems, equal to 43,560 square feet, or 4,840 square yards. One acre is equivalent to 0.4047 hectares (4,047 square meters).
Find two numbers whose sum is 28 and the difference is 4 _____________?
A. 12,16
B. 18,10
C. 15,13
D. 14,12
Explain:
12,16
10 + 10 = 20
2 + 6 = 8
Difference 4 hai
1 10
2 10
3 2
4 8
Suppose Arif can read 39 pages of a book in half an hour. How long will It take her to finish a book that is 1287 pages?
A. 16 Hours
B. 16.5 Hours
C. 17 Hours
D. 15.5 Hours
Arif can Read 39 pages in 30 minutes.
How much time is required to read 1287 pages?
39 page read time = 30 minute
01 page read time=30/39=0.76923 minute
1287 pages read time=0.769*1287=990 minute
990 conversion into hours = 990/60 = 16.5 Hours
Another Simple Explanation:
39 pages for a half hour equals 78 pages per hour and if the book has 1287 pages then 1287 pages divided by 78 pages per hour gives you 16.5.
a number exceeds another number by 5. The sum of the numbers is 19. find the smaller number?
A. 5
B. 6
C. 7
D. 12
Let one of the numbers be “x”; then the other is “x+5”.
Equation:
x + x+5 = 19
2x = 14
x = 7 (the 1st number)
x+5 = 12 (the other number)
What is the Arithmetic Mean of the following data 3,6,9,12,15 ?
A. 7
B. 9
C. 12
D. 8
Naeem sold a computer for Rs 25000 at which he suffered 20 Percent loss. Find the purchase price of the computer.
A. 31000
B. 41250
C. 31250
D. None of These