Question

Влыжныхгонкахучавствуют11 спотрсменов изРоссии, 6 спортсменов из Норвегии и 3 спортсмена изШвеции. Порядок, в котором спортсмены стартуют, определяется жребием.НАЙДИТЕ ВЕРОЯТНОСТЬ ТОГО ЧТО ПЕРВЫМ БУДЕТ СТАРТОВАТЬ НЕ РОССИЙСКИЙ СПОРТСМЕН

Answer 1

надо найти отношение 1 спортсмена ко всем спортсменам( кроме него) 

следовательно

1:(11-1+6+3)

1:19

вроде бы так 

Answer 2

To find the probability that a non-Russian athlete will start first in the cross-country skiing race, we need to consider the total number of athletes and the number of non-Russian athletes.

Given that there are 11 athletes from Russia, 6 athletes from Norway, and 3 athletes from Sweden, the total number of athletes participating in the race is 11 + 6 + 3 = 20.

To calculate the probability, we divide the number of non-Russian athletes by the total number of athletes:

Number of non-Russian athletes = 6 (Norwegian athletes) + 3 (Swedish athletes) = 9

Probability = Number of non-Russian athletes / Total number of athletes = 9 / 20

Therefore, the probability that a non-Russian athlete will start first in the race is 9/20.

Please note that the order in which the athletes start is determined by a draw, so this calculation assumes that the draw is fair and unbiased.