Question

У коробці лежать 5 червоніх,4 зелені і 3 сині кульки.Яка ймовірність того,що навмання вибрана кулька не буде червоною?

Answer 1

Кількість сприятливих подій - витягти нечервону кульку 4+3=7
Кількість всіх можливих подій - витягти кульку 5+4+3=12
Ймовірність витягти навмання нечервону кульку 7/12

Answer 2

Probability of selecting a non-red ball

To calculate the probability of selecting a ball that is not red, we need to determine the total number of balls and the number of non-red balls in the box.

According to the information provided, there are 5 red balls, 4 green balls, and 3 blue balls in the box.

The total number of balls in the box is the sum of the red, green, and blue balls:

Total number of balls = 5 (red balls) + 4 (green balls) + 3 (blue balls) = 12 balls

To calculate the probability of selecting a non-red ball, we need to determine the number of non-red balls and divide it by the total number of balls.

The number of non-red balls is the sum of the green and blue balls:

Number of non-red balls = 4 (green balls) + 3 (blue balls) = 7 balls

Therefore, the probability of selecting a non-red ball is:

Probability = Number of non-red balls / Total number of balls = 7 / 12 ≈ 0.5833

So, the probability that a randomly selected ball will not be red is approximately 0.5833 or 58.33%.

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