Question

A owes b rs.50. he agrees to pay b over a number of consecutive days on a monday, paying single note or rs.10 or rs.20 on each day. in how many different ways can a repay

b.

Answer 1

let a = 10/- Rs , b = 20/- Rs.
10a + 20b = 50..............
now check the a and b's possibility to satisfy the above condition
a = 1 , b = 2
a = 3, b = 1
a = 5, b = 0
so number of combination a and b is = 3
so total ways = 2^3 = 8 (number of arrangement)