


Không thể chia đều 63
In Stock
$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 có 5 viên bi đỏ 3 viên bi vàng và 4 viên bi xanh
- 6 61
- C(5, 2) * C(3, 1) = 10 * 3 = 30 103
- 3 * 4 = 12 101
- Có bao nhiêu cách khác nhau để chọn ra 2 viên bi đỏ và 1 viên bi vàng?
- Nếu bạn lấy ngẫu nhiên 3 viên bi cùng một lúc, xác suất tất cả đều vàng là bao nhiêu?
- Đỏ 117
- (5/12) * 100% ≈ 41.67% 108
- 4/11 180
- Nếu bạn lấy ngẫu nhiên hai viên bi lần lượt, không hoàn lại, xác suất cả hai viên đều vàng là bao nhiêu?
- Vàng 118
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