Algebra 21 Graded Assignment | Unit 5 Part 2 Test | Counting and Probability
3. A box contains 4 black shirts, 8 blue shirts, 4 black pants, and 10 blue pants. Determine
the probability of randomly selecting a blue piece of clothing or a pair of pants. Use this
formula P(A or B) = P(A) + P(B)-P(A and B) to solve and explain what each
probability represents.
a) state what each probability represents. (4 points)
P(B or P): probability of selecting.
P(B): probability of selecting.
P(P): probability of selecting.
P(P and B): probability of selecting.
b) Use this formula P(A or B) = P(A) + P(B)-P(A and B) to solve. You must also label
what the numbers in the numerator and denominator represent. Write your
probability answer as a decimal and round it to the nearest hundredth. (5 points)