According to the information provided about the number of pencils of each color that Elías had in a large box, we have that the number of pencils that Elías took to have at least two black pencils is 21.
How can we determine the number of pencils that Elias took from the box to guarantee having two black pencils?
To determine the number of pencils that Elías took from the box to guarantee having two black pencils, we must add the number of blue pencils, the number of gray pencils, and the two black pencils.
Pencils = blue + gray + 2
Pencils = 11 + 8 + 2
pencils = 21
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