The following pie-charts show the distribution of students of graduate and post-graduate levels in seven different institutes in a town.
Distribution of students at graduate and post-graduate levels in seven institutes:
What is the ratio between the number of students studying at post-graduate and graduate levels respectively from institute S?
A.
14 : 19
B.
19 : 21
C.
17 : 21
D.
19 : 14
Correct answer is D
Required ratio = (21% of 24700)/(14% of 27300) = (21 x 24700)/14 x 27300 = 19/14