The following table shows the percentage of students passing out of four colleges (A,B,C and D) over four years. Study the table and answer the question that follows.
| Years | College A | College B | College C | College D |
| 2019 | 68 | 78 | 56 | 78 |
| 2020 | 72 | 86 | 78 | 82 |
| 2021 | 78 | 91 | 82 | 85 |
| 2022 | 80 | 87 | 84 | 87 |
In which college is the average percentage of passing students over the given four years the least?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. College A.
Given that
The total number of passing students of college A = 68 + 72 + 78 + 80 = 298
The total number of passing students of college B = 78 + 86 + 91 + 87 = 342
The total number of passing students of college C = 56 + 78 + 82 + 84 = 300
The total number of passing students of college D = 78 + 82 + 85 + 87 = 332
Hence, the average percentage of passing students over the given four years is minimum for college A