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Study the given table and answer the questions that follows.
The table shows the number of students Appeared (A) and Passed (P) in a examination, from three schools X, Y and Z in five years.
If m is the average of the number of students passed from school Y over all the five
years and n is the average of the number of students passed from all the three schools
in 2018, then m : n is equal to:
For this question, we would have to find the total number of students that passed from school Y
The number of students that passed from school Y: 175+225+254+280+276 = 1210
The average number of students that passed from Y would be 1210/5 = 242
The average number of students that passed from all three schools combined in 2018 would be $$\frac{242+254+362}{3}=\frac{858}{3} = 286$$
Giving us the ratio to be $$242:286$$
$$11:13$$
Therefore, Option A is the correct answer.
