Final answer:
The mark up rate of a notebook costing Php33.00 with an additional Php3.30 mark up is 10%, which is found by dividing the mark up price by the original cost and multiplying by 100.
Step-by-step explanation:
The question is asking to determine the mark up rate of a notebook that originally costs Php33.00, with an additional Php3.30 added as a mark up by the bookstore owner. To find the mark up rate, you divide the mark up price by the original cost and then multiply the result by 100 to get a percentage.
Here is the calculation:
Markup Rate = (Markup Price / Original Cost) × 100
Markup Rate = (Php3.30 / Php33.00) × 100
Markup Rate = 0.10 × 100
Markup Rate = 10%
Therefore, the correct answer to the given problem is B. 10%.