The average monthly salary of 660 workers in a factory is Rs. 380. The average monthly salary of officers is Rs. 2100 and the average monthly salary of the other workers is Rs. 340. Find the number of other workers. Choose the correct choice from the following choices: A) 645 B) 650 C) 640 D) 642 E) none
Solution: Total salary of 660 workers = 660*380 = Rs. 250800;   If other workers be x; then,   [(660-x)*2100]+340x = 250800   Or, 1386000-2100x+340x = 250800   1760x = 1135200   Hence, x = 1135200/1760= 
<gadget id="calculator">1135200/1760</gadget>
<output>645</output>
645   Number of other workers= 645.   645nswer: Option 645
<result>A</result>
The average monthly salary of 660 workers in a factory is Rs. 380. The average monthly salary of officers is Rs. 2100 and the average monthly salary of the other workers is Rs. 340. Find the number of other workers.