Question

A bakery opened with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 60% of the remaining rolls were sold between noon and closing time. How many dozen rolls were left unsold?

• A. 6
• B. 8
• C. 10
• D. 12

Answer 1

The Correct Option is B

The problem involves calculating the number of unsold rolls after a series of sales. Initially, the bakery starts with 40 dozen rolls. First, half of these rolls are sold by noon.

1. Calculate half of the initial supply: \( \frac{40}{2} = 20 \) dozen rolls are sold by noon.

2. Determine the remaining rolls after the noon sale: The initial 40 dozen minus the 20 dozen sold equals 20 dozen remaining.

3. Between noon and closing, 60% of the remaining 20 dozen rolls are sold:

\( 60\% \times 20= \frac{60}{100} \times 20 = 12 \) dozen rolls. 

4. Calculate the rolls left unsold by subtracting those sold in the afternoon from the remaining rolls after noon:

\( 20 - 12 = 8 \) dozen rolls unsold.

The correct answer is 8 dozen rolls left unsold.

Unsold Rolls

8 dozen