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

Word Problems

Given:

Sum of money is Rs.500

Denominations are Rs.100, Rs.20 notes

No. of Rs.20 notes is 16

To find:

Using both denomination , number of ways X can give Rs.500 to Y.

Explanation:

First, it is needed to find out what sum Rs.20 notes will make,

$Rs. 20\times16=Rs.320$

So, if X wanted to use all 16 notes then maximum X can give Rs.320 to Y.

Hence maximum notes that X can use is 15 because $15\times Rs.20=Rs.300$.

Following are the ways X have for giving Rs.500 to Y

$5 Rs.20\space notes + 4 Rs.100 notes = 500\\10 Rs.20 notes + 3 Rs.100 notes = 500\\15 Rs.20 notes + 2 Rs.100 notes = 500$

Hence, maximum 3 ways are there.

Answer 2

Step-by-step explanation:

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?