The man has a total of 90 notes.

Quick Explanation

Let the number of notes of each type (1-rupee, 5-rupee, 10-rupee) be xxx.

  • Total from 1-rupee notes = 1×x=x1\times x=x1×x=x.
  • Total from 5-rupee notes = 5×x=5x5\times x=5x5×x=5x.
  • Total from 10-rupee notes = 10×x=10x10\times x=10x10×x=10x.

So the total money is:

x+5x+10x=480⇒16x=480⇒x=30x+5x+10x=480\Rightarrow 16x=480\Rightarrow x=30x+5x+10x=480⇒16x=480⇒x=30

He has 30 notes of each of the three denominations, so:

Total notes=3x=3×30=90\text{Total notes}=3x=3\times 30=90Total notes=3x=3×30=90

Answer: 90 notes.