 
Alan G. answered  07/20/16
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Sabrina,
I am not sure what notation you are allowed to use here, but one way to say this is the complement of E ∪ F ∪ G. If you were to draw a Venn diagram, this would be the region in the sample space S which is OUTSIDE E, F, and G.
Do you need the answer stated differently?
     
     
             
                     
                    