1. yu hav 100 werkers, so x+y=100 or y=100-x
2. averaej pae=610$/month
3. x get paed 650$/month & y get 550 $/month
total pae=100*610=61,000
650*x + (100-x)*550=61,000
650x -100x +55000 =61,000
550x =61,000 -55000=6,000
x=6000/550=10.00909090...,,,,round it tu 10
then y=90