Question

В школе 600учеников, 80 из них участвовали только в лыжных соревнованиях, а 40-в соревнованиях по конькам. Опредили, какая часть учащихся школы приняла участие в соревнованиях, и вырази её в процентах.

Answer 1

80+40=120 всего приняло участие
600/100=6 человек это один процент
120/6=20 
Ответ:20 процентов

Answer 2

Calculation of the Percentage of Students Participating in Competitions

To determine the percentage of students who participated in the competitions, we need to calculate the total number of students who participated and divide it by the total number of students in the school.

Given the information provided: - Total number of students in the school: 600 - Number of students who participated in skiing competitions: 80 - Number of students who participated in ice skating competitions: 40

To calculate the total number of students who participated in competitions, we can add the number of students who participated in skiing competitions and the number of students who participated in ice skating competitions:

Total number of students who participated in competitions = Number of students in skiing competitions + Number of students in ice skating competitions

Total number of students who participated in competitions = 80 + 40 = 120

Now, to calculate the percentage of students who participated in competitions, we can divide the total number of students who participated by the total number of students in the school and multiply by 100:

Percentage of students who participated in competitions = (Total number of students who participated / Total number of students in the school) * 100

Percentage of students who participated in competitions = (120 / 600) * 100 = 20%

Therefore, 20% of the students in the school participated in the competitions.