Предмет: Алгебра, автор: dfgddffxx

Помогите пожалуйста решить задачу по т вероятности ​

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Ответы

Автор ответа: au456
1

Объяснение:

вероятность что не получит высокую оценку равна 1-0.7 = 0.3

Формула Бернулли

Вероятность что ровно два получат высокую оценку

Р(2) = С (3;2) * 0,7 ^2 * 0,3 = 3*0,49*0,3 = 0,441

вероятность что получат ровно 3 равна

Р(3) = 0,7^3 = 0,343

что не более двух

Р (<=2) = 1 - Р(3) = 0.657

dfgddffxx: спасибо большое
olha2746164: помоги пожалуйста в профиле умоляю
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