The mean monthly salary paid to 75 workers in a factory is Rs. 5680. The mean salary of 25 of them is Rs. 5400 and that of 30 others is Rs. 5700. The mean salary of the remaining workers is

(a) Rs. 5000 (b) Rs. 6000 (c) Rs. 7000 (d) Rs. 8000

The mean monthly salary paid to 75 workers in a factory is Rs. 5680. The mean salary of 25 of them is Rs. 5400 and that of 30 others is Rs. 5700. The mean salary of the remaining workers is

(a) Rs. 5000 (b) Rs. 6000 (c) Rs. 7000 (d) Rs. 8000

16 children are to be divided into two groups A and B of 10 and 6 children. The average percent marks obtained by the children of group A is 75 and the average percent marks of all the 16 children is 76. What is the average percent marks of children of group B?

(a)77 (b)77 (c)78 (d) 78

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