A bakery opened yesterday with its daily supply of 40 dozen rolls. Half of the…
2026
A bakery opened yesterday with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon and 80 % of the remaining rolls were sold between noon and closing time. How many dozen rolls had not been sold when the bakery closed yesterday?
- A.
8
- B.
0
- C.
4
- D.
6
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Show answer & explanation
Correct answer: C
Step 1: Start with 40 dozen rolls. Half were sold by noon, so the remaining amount is 40 ÷ 2 = 20 dozen.
Step 2: After noon, 80% of the remaining 20 dozen were sold: 0.8 × 20 = 16 dozen sold after noon.
Step 3: Unsold when the bakery closed = remaining after noon − sold after noon = 20 − 16 = 4 dozen.
Answer: 4 dozen rolls were not sold when the bakery closed.