Question

13. A sum of 800 is in the form of denominations of 10 and 20. If the total numb notes is 50, find the number of notes of each type.
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Answer 1

Step-by-step explanation:

⇒  Let the number of notes of Rs.10 be x

∴  The number of notes of Rs.20=50−x

According to the given condition,

⇒  10x+20(50−x)=800

⇒  10x+1000−20x=800

⇒  −10x=800−1000

⇒  −10x=−200

∴  x=10200=20

∴  The number of notes of denomination of Rs.10=20

⇒  The number of notes of denomination of Rs.20=50−20=30

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