Question

В шестом классе учатся 25 человек.Сколькими спосабами из них можно выбрать двух представителей в совет школы?Если кто ришит эту задачку тот будет гулять со мной а я Екатерина Старшова и я Не КЛОН

Answer 1

Сочетание 25 по 2=(25*24)/(2*1)=300

Answer 2

добавлю и свой ответ, раз катя не довольна

если эти представители выполняют одну и ту же задачу, то вариант решения

25*24=600 способов можно выбрать двух представителей в совет школы

Answer 3

Calculation of the Number of Ways to Choose Two Representatives

To calculate the number of ways to choose two representatives from a group of 25 people in the sixth grade, we can use the concept of combinations. In mathematics, the number of combinations of selecting r items from a set of n items is given by the formula:

C(n, r) = n! / (r! * (n-r)!)

Where n! represents the factorial of n, which is the product of all positive integers less than or equal to n.

In this case, we want to choose two representatives from a group of 25 people, so we can substitute n = 25 and r = 2 into the formula:

C(25, 2) = 25! / (2! * (25-2)!)

Simplifying the expression:

C(25, 2) = 25! / (2! * 23!)

Now, let's calculate the value using the factorial function:

C(25, 2) = (25 * 24 * 23!) / (2! * 23!)

The factorial of 23! cancels out:

C(25, 2) = (25 * 24) / 2!

Simplifying further:

C(25, 2) = 25 * 12

Calculating the value:

C(25, 2) = 300

Therefore, there are 300 different ways to choose two representatives from a group of 25 people in the sixth grade.