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?

  1. A.

    8

  2. B.

    0

  3. C.

    4

  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.

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