Question

в корзине 7 белых шаров и 8 черных какова вероятность вынуть 2 белых шара и один черный

Answer 1

Кажется так О_о
2 белых шара 2/8
один черный  1/8

Answer 2

1)7+8=15(шар.)-белых и черных.
2)15*2=30.
так наверно вообще ты даже не написал что именно надо найти...

Answer 3

Calculating the Probability of Drawing 2 White Balls and 1 Black Ball from the Basket

To calculate the probability of drawing 2 white balls and 1 black ball from the basket, we can use the concept of combinations. The probability can be calculated using the formula:

Probability = (Number of favorable outcomes) / (Total number of outcomes)

In this case, the number of favorable outcomes is the number of ways to choose 2 white balls out of 7 and 1 black ball out of 8. The total number of outcomes is the total number of ways to choose 3 balls out of 15 (7 white + 8 black).

Calculation

The number of favorable outcomes can be calculated using combinations:

Number of ways to choose 2 white balls out of 7: ``` C(7, 2) = 7! / (2!(7-2)!) = 21 ```

Number of ways to choose 1 black ball out of 8: ``` C(8, 1) = 8! / (1!(8-1)!) = 8 ```

The total number of outcomes is the number of ways to choose 3 balls out of 15: ``` C(15, 3) = 15! / (3!(15-3)!) = 455 ```

Probability Calculation

Now, we can calculate the probability using the formula:

Probability = (Number of favorable outcomes) / (Total number of outcomes)

Substituting the values: ``` Probability = (21 * 8) / 455 ≈ 0.3703 ```

Conclusion

The probability of drawing 2 white balls and 1 black ball from the basket is approximately 0.3703.