Question

На конференции было 3 норвежца , 4 русских , 3 - ое испанцев . Каждый из них подготовил по одному докладу . Какова вероятность того , что русский выступит восьмым ?

Answer 1

Всего:10
Благоприятных: 4
4/10= 0,4 
Ответ: 0,4 вероятность того, что русский выступит восьмым. 

Answer 2

Probability of a Russian Speaker Being the Eighth

To determine the probability of a Russian speaker being the eighth to speak at the conference, we need to consider the total number of speakers and the number of Russian speakers.

According to the information provided, there were 3 Norwegians, 4 Russians, and 3 Spanish speakers at the conference. Each of them prepared one presentation.

To calculate the probability, we need to know the total number of speakers. However, the total number of speakers is not explicitly mentioned in the given information. Therefore, we cannot provide an exact probability without this information.

If we assume that the total number of speakers is the sum of the three nationalities mentioned (3 Norwegians + 4 Russians + 3 Spanish = 10), then the probability of a Russian speaker being the eighth would be 4/10, or 40%.

Please note that this calculation is based on the assumption that the total number of speakers is 10. If the actual total number of speakers is different, the probability would change accordingly.