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 denominations notes did he have ?

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 denominations notes did he have ?

A 15

B 16

C 18

D 20

Solution

Correct Answer: Option D

Let number of notes of 5tk = x, S number of notes of 2Tk. = 30-x

Then 5x+ 2(30-x) = 120, 5x+60-2x = 120 x = 20