Mr. X lost a wallet containing Tk. 120 . Incidentally, he had only notes of Tk. 2 and Tk. 5 denominations in the wallet . If the total number of notes was 30 , how many Tk. 5 denomination notes did he have?
Created: 6 years ago |
Updated: 3 years ago
best des
Let,
no. of tk.2 notes x
and no. of tk.5 notes y
x + y = 30.............(i)
so, x = 30 - y
2x + 5y = 120.............(ii)
Now,
2(30 - y) + 5y = 120
বা, 60 - 2y + 5y = 120
বা, 3y = 60
so, y = 20
Md Azizur Rahman
Founder of Satt
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