Question

student of a class are made to stand in rows .If 3 students are extra in a row there would be one row less. If 3 students less in row there would be 2 rows more. Find the number of student in the class.

Answer 1

here is your answer total no of students are 60

Answer 2

Answer:

Step-by-step explanation:

Let no. of rows be x and no. Of students in a row be y.

therefore total students in a class are x×y.

According to question

(x-1)×(y+3)=x×you

=xy+3x-y-3=xy

3x-y=3. ....EQ1.

(x+2)×(y-3)=xy

=xy+2y-3x-6=xy

-3x+2y=6. ...EQ2.

Multiply EQ1. With 2

6x-2y=6. ...EQ3.

Adding eq 3 and 2

-3x+2y=6

6x-2y=6

=3x=12

x=4

Putting x=4 in eq 3

6×4-2y=6

24-2y=6

-2y=6-24

-2y=-18

y=9

Hence no. Of rows=4

November. of students in a row =9

TOTAL STUDENTS IN CLASS=xy=9×4=36.