Study the table below and answer the question.
The number of students enrolled for a Vocational Course (VC) in Institutes A, B, C, D, and E during 6 years:
| Institute/Year | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| A | 108 | 116 | 120 | 132 | 128 | 146 |
| B | 122 | 127 | 128 | 136 | 143 | 144 |
| C | 146 | 141 | 148 | 145 | 174 | 206 |
| D | 135 | 147 | 158 | 152 | 160 | 193 |
| E | 149 | 154 | 156 | 178 | 212 | 211 |
The average number of students enrolled in VC in Institute C in six years is what percentage more than the number of students enrolled in Institute E in 2015 (correct to one decimal place)?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 3.9%.
Average for Institute C (all 6 years) = (146 + 141 + 148 + 145 + 174 + 206)/6 = 960/6 = 160
Students in Institute E in 2015 = 154
Percentage = [(160 - 154)/154] × 100 = 3.896...% = 3.9% [approx]