A sum of rupees 500 is in the form of denominations of rupees 5 and rupees 10 if the total number of notes is 90 find the number of notes of each type
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Let the no. of ₹5 notes be x
Hence no. of ₹10 notes would be 90-x
Total sum =₹500
Hence
5x+10(90-x)=500
5x+900-10x=500
-5x=-400
x=-400/-5
x=80
Therefore there are 80 ₹5 notes
No. Of ₹10 notes = 90-x
Therefore there are 10 ₹10 notes
Hence no. of ₹10 notes would be 90-x
Total sum =₹500
Hence
5x+10(90-x)=500
5x+900-10x=500
-5x=-400
x=-400/-5
x=80
Therefore there are 80 ₹5 notes
No. Of ₹10 notes = 90-x
Therefore there are 10 ₹10 notes
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