The following table shows the number of new employees added to different categories of employees in a university and also the number of employees from these categories who left the university every year:
| Professor | Assistant Professor | Associate Professor | Peon | |||||
| New | Left | New | Left | New | Left | New | Left | |
| 2018 | 80 | - | 100 | - | 90 | - | 60 | - |
| 2019 | 100 | 60 | 150 | 40 | 110 | 30 | 80 | 10 |
| 2020 | 150 | 40 | 160 | 30 | 140 | 40 | 70 | 20 |
| 2021 | 180 | 60 | 200 | 50 | 190 | 50 | 80 | 30 |
| 2022 | 200 | 80 | 220 | 60 | 220 | 60 | 90 | 40 |
What is the difference between the total number of professors added to the university and the total number of associate professors added to the university during the years 2019 to 2022?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 30.
Total number of professors added to the university during the years 2019 to 2022 = 100 + 150 + 180 + 200 = 630
Total number of associate professors added to the university during the years 2019 to 2022 = 110 + 140 + 190 + 220 = 660
Difeerence = 30