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Mathematics, 18.10.2021 09:30 Alexandram2163

Thang máy của một tòa nhà 10 tầng xuất phát từ tầng 1 với 5 khách. Coi như mỗi người chọn tầng một cách ngẫu nhiên và độc lập với nhau. Tìm khả năng xảy ra các tình huống sau:
a) Tất cả cùng ra ở tầng 7.
b) Tất cả cùng ra ở một tầng.
c) Mỗi người ra ở một tầng khác nhau.

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Thang máy của một tòa nhà 10 tầng xuất phát từ tầng 1 với 5 khách. Coi như mỗi người chọn tầng một...
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