Предмет: Математика, автор: brendeg

Сколько различных пятизначных чисел можно составить из нечётных цифр,если цифры в числе не могут повторяться?

Ответы

Автор ответа: NNNLLL54

Всего нечетных цифр 5.это 1, 3, 5, 7, 9.
Количество перестановок из 5 цифр будет равно $P_5=5!=1cdot 2cdot 3cdot 4cdot 5=120$
Oтвет: 120

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