Adding Not Mutually Exclusive P(A) + P(B) - P(A*B)
3. When a card is selected at random from a 52-card deck find the probability that the card
is a face card or a spade.
P(A)
P(B)
P(A*B)
4. A die is rolled. Find the probability that the result is an even number or a number less
than 3.
P(A)
P(B)
P(A*B)
5. Two dice are rolled. Find the probability that the number on one die is a 6 or the sum
of the spots is eight.
P(A)
P(B)
P(A*B)
6. A coin is tossed and a die is rolled. Find the probability that the coin falls heads up
or that there is a 4 on the die.
P(A)
P(B)
P(A*B)
7. In a psychology class there are 15 sophomores and 18 juniors. Six of the sophomores
are males and 10 of the juniors are males. If a student is selected at random:
Find the probability that:
a. A junior or a male (need P(A), P(B), P(A*B))
b. A sophomore or a female (need P(A), P(B), P(A*B))
c. A junior (set up a fraction)