Average Practice Test 6

Number of students = 20
Average expense per student = Rs 400
Total expenses = 400 × 20 = Rs 8,000
Number of students = 40
Average expense per student = Rs 300
Total expenses = 40 × 300 = Rs 1,200
Total expenditure = 8,000 + 1,2000 = Rs 20,000
Number of students = 80
Average expense per student =

20,000

800

=Rs‌250