Question 1185686
Skilled to do 1 job,  {{{4R*5=1}}}, meaning the one-worker rate {{{R=1/20}}}


Semi skilled to do 1 job, {{{5r*6=1}}}, meaning the one worker rate  {{{r=1/30}}}



If one of each worker work together, their rate combined is  {{{1/20+1/30}}} in unit jobs per days.
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{{{3/60+2/60}}}


{{{5/60}}}

{{{1/12}}}---------------this is 1 job in 12 days, if 1 semiskilled and 1 skilled worker are working together.