Table 1 shows the percentage of students in six Law Colleges A to F. Table 2 shows the percentage of students across three sections I, II and III for each class (1st to 5th year) of College D. College C has 1080 students; each class of College D has the same number of students.
| College | Share (%) |
|---|---|
| A | 8⅓ |
| B | 10 |
| C | 20 |
| D | 16⅔ |
| E | 30 |
| F | 15 |
| Class | Section I (%) | Section II (%) | Section III (%) |
|---|---|---|---|
| 1st year | 30 | 35 | 35 |
| 2nd year | 50 | 25 | 25 |
| 3rd year | 20 | 55 | 25 |
| 4th year | 45 | 35 | 20 |
| 5th year | 35 | 30 | 35 |
What is the total of the number of students in Section I taken across all classes of College D? (Take each class of College D as 900 students, as in the source solution.)
A320
B324 ✓ Correct
C250
D252
Correct answer: (B) 324
Explanation
The answer is 324.
Section I percentages across the classes are 30, 50, 20, 45 and 35.
Applying each to 900 gives 270, 450, 180, 405 and 315.
The sum of these values is 1620.
The source averages this over the five classes.
So 1620 divided by 5 gives 324.
So the answer is 324.
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