A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes are equal. What is the total number of notes ?
A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes are equal. What is the total number of notes ?
A60
B90
C75
D45
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correct answer is: 90
Explanation: Let the number of each type of note be \( n \). The total amount from each type is \( 1n + 5n + 10n = 16n \). Setting this equal to 480 gives \( n = 30 \). Thus, the total number of notes is \( 3 \times 30 = 90 \).
- Option a (60): Incorrect, as \( 16 \times 60 = 960 \), which exceeds 480.
- Option b (90): Correct, as explained above.
- Option c (75): Incorrect, as \( 16 \times 75 = 1200 \), which is too high.
- Option d (45): Incorrect, as \( 16 \times 45 = 720 \), which is also too high.
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