What is the average number of students who have enrolled in coaching institutes X, Y and Z from school Q ?

Number of students in Institute X = 250
Percentage of students in Institute X from School Q = 20% of 250 = 50
Number of students in Institute Y = 300
Percentage of students in Institute Y from School Q = 24% of 300 = 72
Number of students in Institute Z = 200
Percentage of students in Institute Z from School Q = 32% of 200 = 64
Average number of students in Institutes X,Y and Z from School Q = (50+72+64 )/ 3
= 186/3
=62
Option C is the correct answer.