Mathematics, 08.09.2021 17:50 shakiyahjones99441
Một hộp đựng 12 bóng đèn, trong đó có 5 bóng đèn bị hư. Lấy ngẫu nhiên từ hộp ra 2 bóng đèn. Gọi X là số bóng đèn bị hư lấy được trong 2 bóng đèn lấy ra. Tìm E(X); D(X) và mod X.
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Anut store normally sells cashews for? $4.00 per pound and peanuts for? $1.50 per pound. but at the end of the month the peanuts had not sold? well, so, in order to sell 40 pounds of? peanuts, the manager decided to mix the 40 pounds of peanuts with some cashews and sell the mixture for $2.00 per pound. how many pounds of cashews should be mixed with the peanuts to ensure no change in the? profit?
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Một hộp đựng 12 bóng đèn, trong đó có 5 bóng đèn bị hư. Lấy ngẫu nhiên từ hộp ra 2 bóng đèn. Gọi X l...
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