Question

В турнире участвовало 20 шахматистов сколько партий было сыграно если каждый с каждым сыграл один раз

Answer 1

Было 190 партий, одна партия 2 человека т. е. 190*2=380

Answer 2

Calculating the Number of Games in a Chess Tournament

To calculate the number of games played in a chess tournament where 20 chess players participate and each player plays against every other player exactly once, we can use the formula:

Total number of games = n(n-1) / 2

Where: - n = number of players

Using this formula, we can calculate the total number of games played in the tournament.

Total number of games = 20(20-1) / 2 Total number of games = 20 * 19 / 2 Total number of games = 380 / 2 Total number of games = 190

Therefore, if each player plays against every other player exactly once in a tournament with 20 participants, a total of 190 games will be played.