Details of a school are mentioned in the below caselet:

2017: School PQR was started, the ratio of the number of kids enrolled to the number of teachers is 25: 1, fee for one kid per day is Rs 15

2018: Kids of that year entered into second year and new kids enrolled in grade 1 is 60% of old number of students. The number of teachers increased by 5

2019: New kids entered grade 1 and the rest moved up to the next grades. 10 new kids entered grade 3 and 2 kids entered grade 2. The total number of new kids was 150 which is 25% of kids studying in 2018. Teachers increased by 20%. The ratio of teachers to admin was 3: 2 and this ratio was also maintained in 2017.

2020: The kids entered in grade 3 in 2019 graduated this year. The total strength of students increased by 20% as new kids entered grade 1 and rest moved up into other grades.