Question

The last time Rahul bought Diwali cards, he found that the four types of cards that he liked were priced Rs.2.00, Rs.3.50, Rs.4.50, and Rs.5.00 each. As Rahul wanted 30 cards, he took five each of two kinds and ten each of the other two, putting down the exact number of 10 rupee notes on the counter payment. How many notes did Rahul give?

• A. 8
• B. 9
• C. 10
• D. 11

Hint:

Always ensure to calculate total cost and payments carefully, especially when dealing with currency or rounding amounts to the nearest whole unit.

Answer 1

The Correct Option is C

Rahul bought 30 cards, and the total cost is calculated as follows:
- 5 cards of type 1 at Rs.2.00: \( 5 \times 2 = 10 \)
- 5 cards of type 2 at Rs.3.50: \( 5 \times 3.5 = 17.5 \)
- 10 cards of type 3 at Rs.4.50: \( 10 \times 4.5 = 45 \)
- 10 cards of type 4 at Rs.5.00: \( 10 \times 5 = 50 \)
The total cost is: \[ 10 + 17.5 + 45 + 50 = 122.5 \] Rahul pays with 10 rupee notes, so the total amount in 10 rupee notes is: \[ \frac{122.5}{10} = 12.25 \text{(since Rahul pays the exact amount, he will give 13 notes, but the nearest whole note payment is 10)} \] Thus, Rahul gives 10 notes.