Question

a sum of ₹ 800 is in the form of denomination of ₹10 and ₹ 20 . if the total number of notes is 50 , find the number of notes of each type .​

Answer 1

Answer:

10 rupees note = 20

20 rupees note = 30

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= 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