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Mathematics, 16.12.2021 07:50 yaxcalandreya

Một xí nghiệp Y sản xuất đường phèn có 3 tổ công nhân: Tổ 1 có 10 người, năng suất lao động trung bình mỗi ngày là 19 kg/ngày
Tổ 2 có 8 người với các mức năng suất lao động khác nhau như sau (kg/ngày): 17,5; 18; 18,2;
18,5; 18,6; 19; 19,2; 21.
Tổ 3 có 5 người, mỗi người trong ngày làm được 19,5 kg/ngày
Năng suất trung bình của công nhân trong xí nghiệp Y là (kg/ngày):
A. 19,02 B. 19,18 C. 19,22 D. 19,50

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Một xí nghiệp Y sản xuất đường phèn có 3 tổ công nhân: Tổ 1 có 10 người, năng suất lao động trung...
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