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Option 2 : 37.5
| Class | subjects | pass % students | Number of failed studentS | % of failed students | Total number of students | pass number of students | |
| 10 | Maths | 65 | 105 | 35 |
35% of x = 105 x =300 |
195 | |
| 10 | Hindi | 80 | 120 | 20 |
20% of x = 120 x = 600 |
480 | |
| 11 | English | 40 | 360 | 60 |
60% of x =360 x= 600 |
240 | |
| 12 | Psychology | 75 | 100 | 25 |
25% of x = 100 x = 400 |
300 | |
| 12 | Biology | 50 | 110 | 50 |
50% of x = 110 x = 220 |
110 | |
| Total | 795 | 2120 | 1325 |
Required percentage = (795/2120) × 100
⇒ 37.54
∴ The percentage of the total students who failed considering all the three classes i.e. 10th, 11th and 12th and in all five given subjects is 37.54
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