Elias woke up in the middle of the night and, due to a power cut, it was very dark in his apartment. Elias’ pencils were in one large box and he remembered that there were 11 blue pencils, 14 black pencils and 8 grey pencils in the box. As Elias didn’t see the colour of the pencils, he picked as many pencils from the box so that he would have at least two black pencils. What was the minimum amount of pencils Elias needed to pick to ensure he would get at least two black pencils?

Respuestas 1

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

More about probabilities here:

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