Question

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

Answer 1

Therefore, the number of Rs . 20 notes

will be (50 - x) . Number of Rs . 20 notes

= (50 - 20) = 30 .

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Answer 2

Step-by-step explanation:

Given -

Amount is Rs. 800

In the form of notes of Rs. 10 and Rs. 20

The total notes are 50

Notes of each type = ??

Consider the notes of Rs. 20 as 'z' and Rs. 10 as '50 - z'

Value of Rs. 10 = 10 × (50 - z)

Value of Rs. 20 = 20 × (z)

==> Value of Rs. 10 notes + Value of Rs. 20 notes = Rs. 800

==> 500 - 10z + 20z = 800

==> 10z = 800 - 500

==> 10z = 300

==> z = 300/10

==> z = 30

Number of 20 Rupees notes is 30.

10 Rupees notes = (50 - 30) = 20

Hence, Rs. 10 notes are 20 and Rs. 20 notes are 30.