Question

В лыжных гонках участвуют 7 спортсменов из России, 1 спортсмен из Норвегии и 2 спортсмена из Швеции. Порядок, в котором спортсмены стартуют, определяется жребием. Найдите вероятность того, что первым спортсмен будет стартовать спортсмен из России Только подробно , пожалуйста

Answer 1

Всего спортсменов 7+1+2=10
из норвегии 1
p(A) = 1/10 = 0.1

Answer 2

Всего 7+1+2=10 спортсменов. Из России 7. Вероятность того, что российский будет первым равна 7:10=0,7

Answer 3

Calculation of Probability

To find the probability that the first athlete to start the race is from Russia, we need to consider the total number of possible outcomes and the number of favorable outcomes.

The total number of possible outcomes can be calculated by finding the total number of athletes participating in the race, which is the sum of the athletes from Russia, Norway, and Sweden:

Total number of athletes = 7 (from Russia) + 1 (from Norway) + 2 (from Sweden) = 10 athletes

Now, let's calculate the number of favorable outcomes, which is the number of athletes from Russia:

Number of athletes from Russia = 7

Probability Calculation

The probability of the first athlete being from Russia can be calculated using the formula:

Probability = Number of favorable outcomes / Total number of possible outcomes

Substituting the values:

Probability = 7 / 10 = 0.7

Therefore, the probability that the first athlete to start the race is from Russia is 0.7.