the+mean+monthly+salary+of+75+workers+of+a+factory+is+rupees+5680.the mean salary of 25 of them is rupees 5400 and that 30 others is rupees 5700 find themean salary of the remaining workers
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let the salary of rest 75-(25+30) =75-55=20 be x
total average salary of 75 people= 5680
avg. salary of 25 people = 5400
avg. salary of 30 other people = 5700
total avg. salary of 55 people= 5400+5700=11100
avg salary of 20 people= 11100-5400
= 5700
hope it helps ....
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- Total salary of 75 worker is 75×5680=426000.
- Total salary of 25 workers is, 25×5400=135000
- Total salary. of 36 worker is ,30×5700=171000.
- Total salary of above 55 worker is 306000.
- Remaining 20 workers mean salary is (426000 - 306000)/20=6000
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