n(S)=200
A: The number is divisible 4
B: The number is divisible by 6
n(A)=
200
4
=50
n(B)=
200
6
=33.33=33
P(A∪B)=P(A)+P(B)-P(A∩B)
n(A∩B)=
200
12
=16
P(A)=
n(A)
n(S)
=
50
200
P(B)=
33
200
P(A∩B)=
16
200
P(A∪B)=P(A)+P(B)-P(A∩B)
=
50
200
+
33
200
-
16
200
=
67
200
.