
Элементы комбинаторики
Authored by Ekaterina Mashkova
Mathematics
8th - 9th Grade
Used 15+ times

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7 questions
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1.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
В школе есть все классы - с 1 по 11. Каждый из них имеет дополнительную букву "А", "Б", "В", "Г" или "Д". Например, класс 1А, 7Б и т.д. Сколько всего классов в этой школе?
2.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Сколько различных последовательностей (не обязательно осмысленных) можно составить из букв слова АВТОР?
3.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Вычислите
4.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Найдите вероятность того, что среди трех последних цифр случайного телефонного номера не окажется цифры 3.
5.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Какова вероятность того, что среди последних трех цифр случайного телефонного номера встретится цифра 5?
6.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Вычислите
7.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Сколькими способами можно выбрать 2 предмета из 6?
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