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1. Mr. X lot a wallet containing Tk. 120. Incidentally, he had only lots of Tk. 2 Tk.3 and Tk.5 denominations in the wallet. If the total number of notes was 30, how many Tk. 5 denomination notes did he has?
- A. 15
- B. 15
- C. 15
- D. 15
Answer: Option C
Explanation:
Suppose,
number of 5 taka note = x
number of 2 taka note = (30 - x)
Here, 5x + 2(30 - x) = 120
⇒ 5x + 60 - 2x = 120
⇒3x = 60 .:. x = 20
So, total 5 taka note = 20
number of 5 taka note = x
number of 2 taka note = (30 - x)
Here, 5x + 2(30 - x) = 120
⇒ 5x + 60 - 2x = 120
⇒3x = 60 .:. x = 20
So, total 5 taka note = 20
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