a lady went to a bank with 100000 rupees. she asked the cashier to give her 200 and 500 ruppes currency notes in return. she got 320 currency notes in all. find the number of each kind of currency notes
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Step-by-step explanation:
let the number of 200 notes be x
500 = 320-x
200x + 160000 - 500x = 100000
-300x = -60000
x = -60000/-300
x = 200
the number of 200 rupee notes = 200
the number of 500 rupee notes = 120
verification:
200×200 + 500 × 120
40000 + 60000
= 100000
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