Question

Suppose that you are a teacher with a total of 100 students 10 among them come from a disadvantaged and their average in year 1 is 80/100. All of the other students are not considered disadvantaged and have an average of 90/100. What is the overall average for your students in year 1?

Answer 1

89/100

Explanation:

The average weighted by the number of students is ...

(90(0.90) +10(0.80))/100 = (81 +8)/100 = 89/100