Question

В урне 15 шаров:10 белых,2 черных и 3 красных. Какова вероятность вынуть из урны красный шар?

Answer 1

Вероятность равна общему числу исходов к числу благоприятных. Благоприятных исходов в нашем случае 3 а всего 15,
Значит 3/15 = 1/5 = 0,2 = 20%

Answer 2

13 шаров обязательно нужно вынуть чтобы хотя бы один шар был красным

Answer 3

Probability of Drawing a Red Ball from the Urn

In the given urn, there are a total of 15 balls, consisting of 10 white, 2 black, and 3 red balls. We want to find the probability of drawing a red ball from the urn.

The probability of an event is calculated by dividing the number of favorable outcomes by the total number of possible outcomes. In this case, the favorable outcome is drawing a red ball, and the total possible outcomes are the total number of balls in the urn.

The probability of drawing a red ball can be calculated using the formula: Probability = (Number of favorable outcomes) / (Total number of possible outcomes)

Using this formula, the probability of drawing a red ball from the urn can be calculated as follows:

Probability = (Number of red balls) / (Total number of balls)

Substituting the given values: Probability = (3) / (15)

Therefore, the probability of drawing a red ball from the urn is 3/15 or 1/5.