Question

В районной олимпиаде по математике 42 участника стали призёрами, что составляет 21% всех участников олимпиады, Сколько человек учавствовало в районной олимпиаде по математике?

Answer 1

1) 42*100/21=200 человек всего

Answer 2

Х*21/100=42
Х=42*100/21=2*100=200
Ответ: 200 человек.

Answer 3

Calculation of the Number of Participants in the Math Olympiad

To determine the number of participants in the district math olympiad, we can use the information provided that 42 participants became winners, which represents 21% of all the participants in the olympiad.

Let's assume the total number of participants in the math olympiad is represented by the variable x.

According to the given information, 42 participants represent 21% of all the participants. Mathematically, we can express this as:

42 = 0.21 * x

To find the value of x, we can rearrange the equation:

x = 42 / 0.21

Now, let's calculate the value of x:

x = 42 / 0.21 = 200

Therefore, there were 200 participants in the district math olympiad.