Find the mean salary of 60 workers of a factory from the following table:

Mean=Sum of observations/Total number of observations
Or
Mean=Σfixi/Σfi
f1+f2+…+f8=16+12+10+8+6+4+3+1
x1+x2+…+x8=3000+4000+5000+…
f1x1+f2x2+…=3000×16+4000×12+…
Mean=305000/60=5083.33