Question

a sum of rupee 500 is in the form of denominations of rupee 5 and rupee 10. If the total number of notes is 90 find the number of notes of each type

Answer 1

let no. of notes of denomination 5 rupees be x and no. of note of denomination 10 rupees be y

then,
x+y=90
5x+10y=500
y=10,x=80