Question

1. The number of employees of three firms and their monthly average salary are as follows. Find the combined mean from it. Firm А ,B ,С No. of employees 18, 32 ,50 Average salary 348.5 , 415, 510.8 respectively​

Answer 1

Answer:

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Answer 2

Answer:

Number of wage earner in firm A=586

Mean of monthly wage of firm A=Rs5253

 Mean of monthly age of firm A = No. of wage earners in firm A Total amount paid 

5253=586Total amount paid

Total amount paid by Firm A =5253×586

Number of wage earner in firm B=648

Mean of monthly wage of firm B=Rs5253

 Mean of monthly age of firm B = No. of wage earners in firm B Total amount paid 

5253=648Total amount paid

Total amount paid by Firm B =5253×648

Clearly, firm B paid larger amount as monthly wage.