Question

10. Devi has a total of Rs.800 as currency notes in the denominations of Rs.10 and Rs.20. If the total number of notes be 50 then find the number of notes of each type. orooontage et tud​

Answer 1

Answer:

here is your answer

Step-by-step explanation:

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

Answer 2

Answer:

hope this is helpful

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=

10

200

=20

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

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

Thanks