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CBSE Class 8 Answered

Devishi has a total of rupees 590 as currency notes in the denominations of RS50, RS20, RS10, the ratio of the numbers of RS50 notes and 20 notes is 3:5. If she has total of 25 notes how many of  cache denominations she has?
Asked by navaneeth1508 | 19 Jun, 2018, 10:42: PM
answered-by-expert Expert Answer
Let the number of Rs. 50 notes and Rs. 20 notes be 5x and 3x respectively.
As she ahs 25 notes in total.
The number of Rs. 10 notes = 25 - (3x + 5x) = 25 - 8x
The amount she has 
Total money = 590
3x × 50 + 5x × 20  + 10 (25 - 8x) = 590
150x + 100x + 250 - 80x = 590
170x = 340
x = 2
The number of Rs. 50 notes = 3 × 2 = 6
The number of Rs. 20 notes = 5 × 2 = 10
The number of Rs. 10 notes = 25 - 8 × 2 = 9
Answered by Sneha shidid | 20 Jun, 2018, 09:24: AM

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