



Trong trường hợp thêm hộp xanh-vàng, tổng số quả đỏ là bao nhiêu?
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$34.99
$29.99
Shipping and Returns Policy
- Deliver to United States » Shipping Policy «
- - Shipping Cost: $5.99
- - Handling time: 2-3 business days
- - Transit time: 7-10 business days
- Eligible for » Returns & Refund Policy « within 30 days from the date of delivery
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một hộp chứa 35 quả cầu gồm 20 quả cầu đỏ
- (20/35) * (20/35) 11
- Một sự kiện không thể xảy ra (dựa trên thông tin ban đầu) 56
- C(35, 2) = (35 * 34) / 2 = 595 79
- C(15, 3) / C(35, 3) 120
- (20/35) * (19/34) 7
- 15 * 10 = 150 83
- 15/35 160
- Nếu định nghĩa biến ngẫu nhiên X là số quả cầu đỏ lấy được khi lấy 1 quả, thì X có thể nhận giá trị nào?
- Khi trộn hai hộp, xác suất lấy được quả đỏ là bao nhiêu?
- 20/35 159
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