Answer:
p(even or prime) =
.
Step-by-step explanation:
Given : A standard number cube is tossed.
To find : find p(even or prime).
Solution : We have given that a cube is tossed.
Total number of number in a cube = 1,2,3,4,5,6
Even number = 2,4,6.
Prime number = 2 , 3, 5.
Probability of even number =
=
.
Probability of prime number =
=
.
P(A orB) = P(A)+P(B).
Then,
2 is even as well as prime So
p(even or prime) = P(even) +P(prime) - P(2).
p(even or prime) =
+
-
p(even or prime) = 1-
.
p(even or prime) =
.
Therefore, p(even or prime) =
.