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
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Therefore, the number of Rs . 20 notes
will be (50 - x) . Number of Rs . 20 notes
= (50 - 20) = 30 .
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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.
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