According to the given table, what is the ratio of total students who passed to total students who failed considering all the three classes i.e. 10th, 11th and 12th and all the five given subjects?

Class	Subjects	Pass % of Students	No. of Failed Students
10th	Maths	65	105
10th	Hindi	80	120
11th	English	40	360
12th	Psychology	75	100
12th	Biology	50	110

Correct option is D

Given:

A table showing pass percentages and the number of failed students for five subjects.
Formula Used:

$$\text{Total Students} = \frac{\text{Failed Students}}{100 - \text{Pass \%}} \times 100$$​​
Solution:
Maths:
Total Students =$$\frac{105}{100 - 65} \times 100 = \frac{105}{35} \times 100 = 300$$​​

Passed Students = 300 - 105 = 195 
Hindi:
Total Students =$$\frac{120}{100 - 80} \times 100 = \frac{120}{20} \times 100 = 600$$​​
Passed Students = 600 - 120 = 480 
English:
Total Students =$$\frac{360}{100 - 40} \times 100 = \frac{360}{60} \times 100 = 600$$​​
Passed Students = 600 - 360 = 240 
Psychology:
Total Students$$= \frac{100}{100 - 75} \times 100 = \frac{100}{25} \times 100 = 400$$​​
Passed Students = 400 - 100 = 300 
Biology:
Total Students =$$\frac{110}{100 - 50} \times 100 = \frac{110}{50} \times 100 = 220$$​​
Passed Students = 220 - 110 = 110 

Total Passed Students:

195 (Maths) + 480 (Hindi) + 240 (English) + 300 (Psychology) + 110 (Biology) = 1325

Total Failed Students:

105 (Maths) + 120 (Hindi) + 360 (English) + 100 (Psychology) + 110 (Biology) = 795

​$$\frac{\text{Total Passed}}{\text{Total Failed}} = \frac{1325}{795}= \frac{265}{159}$$​​

Thus, the ratio of total students who passed to total students who failed is 265:159.