Aman has an equal number of one, five, ten and twenty rupee bank notes, to make a total of ₹ 1,080. How many bank notes does Aman have in total?

Let the number of one rupee notes with the Aman = a

Aman has an equal number of one, five, ten and twenty rupee bank notes

$$\Rightarrow$$  Total number of notes with Aman = 4a

Total amount with Aman = ₹ 1,080

$$\Rightarrow$$  $$\left(1\times a\right)+\left(5\times a\right)+\left(10\times a\right)+\left(20\times a\right)=1080$$

$$\Rightarrow$$  $$36a=1080$$

$$\Rightarrow$$  $$a=30$$

$$\therefore\ $$Total number of notes with Aman = 4a = 4 x 30 = 120

Hence, the correct answer is Option C