Question

a sum of RS 2500 is in the form of denominations of RS 50 and 100.if total number of notes 30,find the number of notes of each type.​

Answer 1

Correct answer:-

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

∴ 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= 200/10

=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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Answer 2

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