Question

Students of class are made tt
o stand in a rows. If one student is extra in each row, there would be 2 rows less. If one student is less in each row, there would be 3 rows more. Find the number of students in the class.​

Answer 1

Step-by-step explanation:

Let x be tens digit and y be one's digit

(x-2)(y+1) = xy

= xy+x-2y-2 = xy

= x-2y= 2 (i)

(x+3)(y-1) = xy

= xy-x+3y-3 = xy

= -x+3y= 3 (ii)

By elimination addition method

-x+3y= 3 + x-2y= 2

= y=5

Substitute y=5 in (i)

x= 12

Total no of students = xy

= 12 x 5 = 60 students

Answer 2

Step-by-step explanation:

Students are stand in row = x

$x - 2 + 3$