Quantitative Aptitude

General Questions

1.  Find the average of all the number between 6 and 34 which are divisible by 5.
A. 18
B. 20
C. 24
D. 30
2.  The average of first five multiples of 3 is :
A. 3
B. 9
C. 12
D. 15
3.  The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?
A. 0
B. 1
C. 10
D. 19
4.  The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers ?
A. 2
B. 5
C. 8
D. Cannot be determined
E. None of these
5.  A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is :
A. 250
B. 276
C. 280
D. 285
6.  The average of five number is 27. If one number is excluded, the average becomes 25. The excluded number is :
A. 25
B. 27
C. 30
D. 35
7.  The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. What is the average of the remaining two numbers ?
A. 4.5
B. 4.6
C. 4.7
D. 4.8
8.  The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is :
A. 17 kg
B. 20 kg
C. 26 kg
D. 31 kg
9.  If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of all the students is :
A. 53.33
B. 54.68
C. 55
D. None of these
10.  The man of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :
A. 35.2
B. 36.1
C. 36.5
D. 39.1

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