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lettry100
2 năm trước
1. 1 hộp chứa 40 thẻ đánh số từ 1 đến 40 chọn ngẫu nhiên 5 thẻ. tính xác suất a. thẻ được chọn là bội của 3 b. có đúng 3 thẻ là số nguyên tố Giúp mk vs ạ
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