To find out how many colored pencils are in the display, we can start by calculating the total number of boxes and then multiply that by the number of colored pencils in each box.
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First, calculate the total number of boxes: \[ \text{Total boxes} = \text{rows} \times \text{boxes per row} = 24 \times 12 = 288 \]
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Next, calculate the total number of colored pencils: \[ \text{Total colored pencils} = \text{total boxes} \times \text{colored pencils per box} = 288 \times 64 \]
Now, we perform the multiplication: \[ 288 \times 64 = 18432 \]
Thus, the total number of colored pencils in the display is 18,432.
The correct answer is: b. 18,432 colored pencils.