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Delvig [45]
3 years ago
6

Cho tập số tự nhiên từ 1 đến 20, lấy ngẫu nhiên ba số. Xác suất để ba số lấy được lập thành cấp số cộng là

Mathematics
1 answer:
pogonyaev3 years ago
7 0
I know right? Hope you have
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