6. 

If 20% of a = b, then b% of 20 is the same as:

A. 4% of a
B. के 5% एक
C. के 20% एक
D. इनमे से कोई नहीं

7. 

In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is of the number of students of 8 years of age which is 48. What is the total number of students in the school?

A. 72
B.

80

C.

120

D.

150


8. 

Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. Find the ratio of A : B.

A. 2 : 3
B.

1 1

C.

3: 4

D.

4: 3


9. 

A student multiplied a number by 3 instead of 5 .
5 3

What is the percentage error in the calculation?

A. 34%
B.

44%

C.

54%

D.

64%


10. 

In an election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was:

A. 2700
B. 2900
C. 3000
D. 3100