If four students are made to sit in a row, then 3 don't have seats. If 15 students are made to sit in a row, then two rows are empty. How many students have to sit a row such that each row has equal number of students and all students are seated? Choose the correct choice from the following answers:
A) 0	B) 1	C) 4	D) 5	E) 9
Let there be a rows.   Then 4a + 3= 15(a-2) [equating the number of students]   =&gt; a= 3   and total number of students = 15   Therefore 5 students much sit in each row such that each row has an equal number of students and all students are seated.   Option (5)
<result>D</result>
If four students are made to sit in a row, then 3 don't have seats. If 15 students are made to sit in a row, then two rows are empty. How many students have to sit a row such that each row has equal number of students and all students are seated?