Classrooms have a capacity of either 30 or 31 students. if

Question

307 students are assigned to rooms that are to be filled to capacity, how many rooms had exactly 30 students?

Answer 1

Madison, we first have to add 30 + 31 = 61. How many times does 61 go into 307? Five, because 61 x 5 = 305.

This means there are 5 of each classroom. We still have two students left over, though, so they will have to be added to two of the 30 rooms, so there are now 7 classrooms of 31 and 3 of 30.

 

Hope this helps!