Question 1183347
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The total number of jobs  is  72 + 98 + 95 + 89 + 23 + 45 + 78 + 90 + 23 = 613.


The contractor’s expected profit per month = {{{3000*(1*(72/613) + 2*(98/613) + 3*(95/613) + 4*(89/613) + 5*(23/613) + 6*(45/613) + 7*(78/613) + 8*(90/613) + 9*(23/613))}}} = 


                                           = 300*4.514 = 13541 dollars (rounded).
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