xchickmagnet3407 xchickmagnet3407

19-06-2021
Mathematics

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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

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ari91916 ari91916

19-06-2021

I know right? Hope you have

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