A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?
45
60
75
90
Explanation:
Let number of notes of each denomination be $ x $.
Then $ x $ + 5$ x $ + 10$ x $ = 480
$\Rightarrow$ 16$ x $ = 480
$\therefore x $ = 30.
Hence, total number of notes = 3$ x $ = 90.