25. A sum of 500 is in the form of denominations of 5 and ? 10. If the total number of notes is 90.
find the number of notes of each type.
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Answer:
Step-by-step explanation:
Let the number of 5 rupee notes be x,then
The number of 10 rupee notes =90−x
Then ,according to the question
5x+10(90−x)=500
5x+900−10x=500
5x=400
x=80
There are 80 notes of Rs.5 and 10 notes of Rs.10.
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