Question

В первой урне находятся 6 черных и 4 белых шара, во второй 5 черных и 7 белых шаров. Из каждой урны извлекают по одному шару. Какова вероятность того, что оба шара окажутся белыми?

Answer 1

Думаю чтт 0,2 либо 20%

Answer 2

Probability of drawing two white balls

To calculate the probability of drawing two white balls, we need to consider the number of white balls in each urn and the total number of balls in each urn.

In the first urn, there are 4 white balls out of a total of 10 balls (6 black + 4 white). In the second urn, there are 7 white balls out of a total of 12 balls (5 black + 7 white).

To calculate the probability of drawing two white balls, we need to multiply the probability of drawing a white ball from the first urn by the probability of drawing a white ball from the second urn.

The probability of drawing a white ball from the first urn is 4/10. The probability of drawing a white ball from the second urn is 7/12.

Therefore, the probability of drawing two white balls is:

(4/10) * (7/12) = 28/120 = 7/30.

So, the probability that both balls will be white is 7/30.