Question

Aarushi has a total of Rs 590 as currency notes in the denominations of Rs 50, Rs 20 and Rs 10. The ratio of the number of Rs 50 notes and Rs 20 notes is 3:5. If she has a total of 25 notes, how many notes of each denomination she has?
none of these
12, 15
10, 9
10, 10

Answer 1

The answer is  6, 10, 9
===========================
let number of Rs 50 notes = 3 N
number of Rs 20 notes = 5 N
The number of Rs 10 notes = 25  - 3 N - 5 N = 25 - 8 N

Total Value of the notes:
  Rs 590 =  3 N * 50 + 5N * 20 + (25 - 8 N) * 10
             = 170 N + 250

  N = 340 / 170  = 2

So  there are 6 notes of Rs 50,  10 notes of Rs 20 and  9 notes of Rs 10.

Answer 2

Answer:

Step-by-step explanation:

Given Devshi has 590 Rupees

RS50,20&10 are there ⇒ Total 25 notes

Rs50&Rs20 ⇒3:5

Notes of Rs50=3x

Notes of Rs20=5x

Notes of Rs10=25−(3x+5x)=25−8x.

Amount in 50 Rupee notes ⇒50×3x=150x

Amount in 20 Rupee notes ⇒20×5x=100x.

Amount in 10 Rupee notes ⇒10(25−8x)=250−80x

Total Amount =590

⇒150x+100x+250−80x=590

⇒250−80x=590−250

⇒170x=340

∴x=2

So Deveshi has

Notes of Rs.50=3(2)=6

Notes of Rs.20=5(2)=10

Notes of Rs.10=25−8(2)=16