Correct Answer - Option 2 : 60
Given:
Total number of student is 600.
55% students passed in Geography.
65% students passed in Economics.
30% students passed in both these subjects.
Formula Used:
Failed % = 100 - (Passed % in geography + Passed % in economics - Passed % in both subject)
Calculation:
Failed % = 100 - (55 + 65 - 30) = 10%
The number of failed student = 10/100 × 600 = 60
∴ The number of failed student is 60.