The average weekly salary per head of all employees is Tk. 1000 (Supervisors and Labours). The average weekly per head salary of all supervisors is Tk. 6000 while the average weekly salary per head of all labours is Tk. 750. If there are 840 labours in it find the number of supervisors
A. 38
B. 40
C. 42
D. 44
সঠিক উত্তরঃ
C.
42
Explanation:
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