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**