Question

В ящике находится 4 белых и 10 черных шаров. Наугад вынимают один из них. Найдите вероятность того, что вынут черный шар.

Answer 1

Ответ:

5/7

Пошаговое объяснение:

всего 4+10=14 шаров

вероятность=10/14=5/7

Answer 2

#### Problem Statement In a box, there are 4 white balls and 10 black balls. One ball is randomly drawn from the box. We need to find the probability of drawing a black ball. #### Solution To find the probability of drawing a black ball, we need to calculate the ratio of the number of black balls to the total number of balls in the box. The total number of balls in the box is the sum of the number of white balls and the number of black balls, which is 4 + 10 = 14. The number of black balls is 10. Therefore, the probability of drawing a black ball is given by: **Probability of drawing a black ball = Number of black balls / Total number of balls** **Probability of drawing a black ball = 10 / 14** Simplifying the fraction, we get: **Probability of drawing a black ball = 5 / 7** So, the probability of drawing a black ball is **5/7**.