Question

student of a class are made to stand in x rows,each row having 11 students.The last row has only 7 students .find a rule of determining the number of students in the class

Answer 1

x is the total no.of rows.
as the last row has 7students, so the rest rows have 11students each,i.e: x-1 rows.
Thus total no.of students=(X-1)×11 + 7
=11x - 4