The mean monthly salary paid to 75 workers in a factory is Rs. 5680.…

Question

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-

Accepted Answer

Option B. Rs. 6000. Answer & Solution Answer: Option B Solution: Required average = Rs . [ ( 5680 × 75 ) - \ ( 5400 × 25 ) + ( 5700 × 30 ) \75 - ( 25 + 30 ) ] = Rs . [ 426000 - ( 135000 + 171000 )20 ] & = Rs . ( 12000020 ) & = Rs . 6000