Question

I had to give Rs. 7 change to a person. I had enough coins of Rs. 1, Rs. 2, Rs. 5 . then in how many ways can I pay him ?​

Answer 1

5+2 , 2+2+2+1;1+1+1+1+1+1+1 or 1 into 7

Answer 2

7x1
(5x1)+2
(3x1)+(2x2)
1+(3x2)
(1x2)+5
(2x1)+5