Question

A sum of ₹800 is in the form of denominations of ₹10 and ₹20.If the total number of notes be 50,find the number of notes of each type

Answer 1

800 = (20 * 30) + (10 * 20)

So the number of 20 rupees notes will be 30 and the number of 10 rupees notes will be 20

Answer 2

this answer can be done using linear equations iin two variables