The total students needing tutoring is 800.
800/17 is the divisor.
345 ÷ (800/17) = 7 ( rounded)
245 ÷ (800/17) = 5 (rounded)
160 ÷ (800/17) = 3 (rounded)
50 ÷ (800/17) = 1 (rounded)
7+5+3+1 = 16
The last tutor of the 17 could be assigned in several ways.
1. As a floater, going to different groups as needed.
2. To the largest group.
3. To the group with the largest remainder (160).
4. Based on school prorities.
Since 800/17 is about 47, let's round this to 46.
Now, using this as our modified divisor,
345/46 = 8 rounded
245/46 = 5 rounded
160/46 = 3 rounded
50/46 = 1 rounded
Now all 17 tutors have been allocated.
I also tried several other nearby numbers, but this seemed to be the best.