Students of class are made tto 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. About the author Madeline
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 Reply
Step-by-step explanation:
Students are stand in row = x
[tex] x – 2 + 3[/tex]
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