Question 1182724
P(A)+P(B)-P(A+B)=P(A or B)
P(E)=0.5
0.5+P(M)-P(E+M)=P(E or M)
P(E+M)=0.6
P(E or M)=0.8
so
0.5+P(M)-0.6=0.8
P(M)=0.9