A production company employs 20 workers on the day shift, 15 on the swing shift and 10 workers on the graveyard shift. A quality control consultant is to select 6 of these workers at random for in-depth interviews. Selection is made in such a way any particular group of 6 workers have the same chance of being selected as does any other group.(drawing 6 slip without replacement from among the 45)
a) HOW MANY SELECTION RESULT IN ALL 6 WORKERS COMING FROM THE DAY SHIFT?

Question

A production company employs 20 workers on the day shift, 15 on the swing shift and 10 workers on the graveyard shift. A quality control consultant is to select 6 of these workers at random for in-depth interviews. Selection is made in such a way any particular group of 6 workers have the same chance of being selected as does any other group.(drawing 6 slip without replacement from among the 45) 
a) HOW MANY SELECTION RESULT IN ALL 6 WORKERS COMING FROM THE DAY SHIFT?