The table given below shows the number of students studying in different streams of a particular college. Find the ratio of the average number of students studying science in the given years to the total strength of students studying in the year 2022 .
| Year | Arts | Science | History | Social Science |
| 2018 | 65 | 78 | 43 | 24 |
| 2019 | 93 | 69 | 36 | 24 |
| 2020 | 67 | 83 | 25 | 30 |
| 2021 | 75 | 55 | 35 | 15 |
| 2022 | 76 | 65 | 48 | 31 |
1
7 ∶ 22
2
35 ∶ 22
3
22 ∶ 7
4
22 ∶ 35