Correct Answer - Option 2 : 529
Formula used:
Average = Sum of all the terms/Total number of terms
Calculation:
Total number of students who passed in the exam in 2015 in all the four Zones = 472 + 324 + 480 + 840 = 2116
Average = 2116/4 = 529
∴ The average number of students who passed in the exam from all the four Zones in the year 2015 is 529