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2 năm trước
Bài 4: Thời gian hoàn thành cùng một loại sản phẩm của 60 công nhân được cho trong bảng sau (tính bằng phút): Thời gian (x) 3 4 5 6 7 8 9 10 Tần số (n) 2 2 3 5 6 19 9 14 N = 60 Tính thời gian trung bình hoàn thành một loại sản phẩm.
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Underline the mistake and correct it 1. My keys were find in the living room. ________________________________________________________________ 2. Household rubbish is took to a large dump. ________________________________________________________________ 3. The local library located near the local school. ________________________________________________________________ 4. The chair was fixed with Jim. ________________________________________________________________ 5. This fridge was bought in 2000 by my brothers. ________________________________________________________________ 6. The birthday cake was cutted into 8 pieces. ________________________________________________________________ 7. The organization were founded in 1970. ________________________________________________________________ 8. The streets are litter with rubbish. ________________________________________________________________ 9. The old man helped by his grandchildren. ________________________________________________________________ 10. Many houses were destroy in the flood. ________________________________________________________________

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