Question

В лыж­ных гон­ках участ­ву­ют 13 спортс­ме­нов из Рос­сии, 2 спортс­ме­на из Нор­ве­гии и 5 спортс­ме­нов из Шве­ции. По­ря­док, в ко­то­ром спортс­ме­ны стар­ту­ют, опре­де­ля­ет­ся жре­би­ем. Най­ди­те ве­ро­ят­ность того, что пер­вым будет стар­то­вать спортс­мен не из Рос­сии.

Answer 1

11 спортсменов не из России, тогда по вероятности 11:13=0.84 ( вероятность до единицы)  

Answer 2

Probability of a non-Russian athlete starting first in a ski race

To find the probability of a non-Russian athlete starting first in a ski race, we need to consider the total number of athletes and the number of non-Russian athletes participating.

According to the information provided, there are 13 athletes from Russia, 2 athletes from Norway, and 5 athletes from Sweden participating in the race. The order in which the athletes start is determined by a draw.

To calculate the probability of a non-Russian athlete starting first, we need to determine the total number of athletes and the number of non-Russian athletes.

The total number of athletes participating in the race is 13 (from Russia) + 2 (from Norway) + 5 (from Sweden) = 20 athletes.

The number of non-Russian athletes is 2 (from Norway) + 5 (from Sweden) = 7 athletes.

Therefore, the probability of a non-Russian athlete starting first can be calculated as the number of non-Russian athletes divided by the total number of athletes:

Probability = Number of non-Russian athletes / Total number of athletes

Probability = 7 / 20

Simplifying the fraction, we get:

Probability = 0.35

Therefore, the probability of a non-Russian athlete starting first in the ski race is 0.35 or 35%.

Please note that the information provided is based on the given data and may not reflect the actual probability in a real-life scenario.