Question

In how many ways can X give Rs 500 to Y using only Rs 100 and Rs 20 notes, with the condition that she has
only 16 notes of Rs 20, and being asked to use the notes of both the denominations?​

Answer 1

Answer:

3

Step-by-step explanation:

Total amount in Rs.20 notes=16*20=Rs.320

The possible ways of giving using both notes are

15*20+2*100=500 (since only 16 Rs.20 notes are available we start with 15)

10*20+3*100=500

5*20+4*100=500 (since both denominations should be present we stop here)

3 ways(using both notes)

Answer 2

Answer:

There are three ways to make a sum of rupees 500

Step-by-step explanation:

we will first calculate the total amount of rupees

i.e. $16 *20 = 320$

we have to use the notes of both the denomination

hence we have to make certain combinations of 500 using both denominations.

$15*20 + 2*100 = 500$

$10*20 + 3*100=500$

$5*20+4*100=500$

Hence, there are three ways that we can use to make a sum of 500.