Предмет: Математика, автор: Daryana69

найти вероятность того что событие наступит ровно 3 раза из 4 испытайний , если p=0,8

Ответы

Автор ответа: Эксперт5

Решаем задачу по формуле Бернулли.
$p=0,8\q=1-0,8=0,2\\P_4^3=C_4^3p^3q^{3-1}=C_4^3p^3q\\P_4^3=4*0,8^3*0,2=4*0,512*0,2=0,4096$

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