Study the following table and answer the question:
The number of students enrolled for Vocational Courses(VC )in institute F in 2015,2017 and 2018 and the average number of students enrolled in all the six institutions A, B, C, D, E & F.
| Years/Institution | 2014 | 2015 | 2016 | 2017 | 2018 |
| A | 110 | 150 | 165 | 180 | 205 |
| B | 120 | 180 | 176 | 200 | 220 |
| C | 140 | 220 | 180 | 175 | 225 |
| D | 125 | 210 | 175 | 180 | 230 |
| E | 150 | 200 | 160 | 200 | 240 |
| F | 165 | 230 | 200 | 220 | 210 |
The difference between the average number of students enrolled for VC in institute F in 2015,2017 and 2018 and the average number of students enrolled in all the six institutions in 2014 is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 85
The average number of students enrolled for VC in institute F in 2015,2017 and 2018 = (230 + 220 + 210)/3 = 220.
The average number of students enrolled in all the six institutions in 2014 = (110 + 120 + 140 + 125 + 150 + 165)/6 = 810/6 = 135.
Required difference = 220 - 135 = 85.