Question

В коробке лежат футболки: 2 зеленые, 3 желтые и 6 синих. Сколько футболок надо достать не глядя, чтобы среди них были три футболки: а) одного цвета, б) разных цветов?

Answer 1

нужно 2+3+6=12 футболок

тк можно вытягивать много раз разных цветов

Answer 2

Б)6 а) все футболки помойму так

Answer 3

Calculating the Number of T-Shirts

To determine how many t-shirts need to be pulled out without looking to ensure that there are three t-shirts of the same color and three t-shirts of different colors, we can calculate the minimum number of t-shirts required for each scenario.

a) Three T-Shirts of the Same Color: To ensure that there are three t-shirts of the same color, the worst-case scenario would be that the first two t-shirts pulled out are of different colors. The third t-shirt pulled out would then guarantee three t-shirts of the same color.

b) Three T-Shirts of Different Colors: To ensure that there are three t-shirts of different colors, the worst-case scenario would be that the first two t-shirts pulled out are of the same color. The third t-shirt pulled out would then guarantee three t-shirts of different colors.

Calculation

Let's calculate the minimum number of t-shirts required for each scenario.

a) Three T-Shirts of the Same Color: The worst-case scenario would be pulling out 2 t-shirts of different colors, followed by the third t-shirt of the same color. So, the minimum number of t-shirts required for three t-shirts of the same color is 3.

b) Three T-Shirts of Different Colors: The worst-case scenario would be pulling out 2 t-shirts of the same color, followed by the third t-shirt of a different color. So, the minimum number of t-shirts required for three t-shirts of different colors is also 3.

Therefore, to ensure that there are three t-shirts of the same color and three t-shirts of different colors, a minimum of 3 t-shirts need to be pulled out without looking.

I hope this helps! If you have any other questions, feel free to ask.