Algebra II.4.A.6 - Probability Rules – Exit Ticket
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2 Questions
10
1.
Of the light bulbs available at a store, 42% are fluorescent, 23% are labeled as
long life, and 12% are fluorescent and long life.
a. A light bulb will be selected at random from the light bulbs at this store.
Rounding your answer to the nearest thousandth where necessary, find the
probability that
i. The selected light bulb is not fluorescent.
ii. The selected light bulb is fluorescent given that it is labeled as long
life.
b. Are the events “fluorescent” and “long life” independent? Explain.
Of the light bulbs available at a store, 42% are fluorescent, 23% are labeled as
long life, and 12% are fluorescent and long life.
a. A light bulb will be selected at random from the light bulbs at this store.
Rounding your answer to the nearest thousandth where necessary, find the
probability that
i. The selected light bulb is not fluorescent.
ii. The selected light bulb is fluorescent given that it is labeled as long
life.
b. Are the events “fluorescent” and “long life” independent? Explain.
10
2.
When a person is selected at random from a very large population, the
probability that the selected person is righthanded is 0.82. If three people are
selected at random, what is the probability that
a. They are all right-handed?
b. None of them is right-handed?
When a person is selected at random from a very large population, the
probability that the selected person is righthanded is 0.82. If three people are
selected at random, what is the probability that
a. They are all right-handed?
b. None of them is right-handed?
From EngageNY.org of the New York State Education Department. Grade Algebra II Mathematics Module 4, Topic A, Lesson 6. Internet. Available from https://www.engageny.org/resource/algebra-ii-modul...; accessed 21/Apr/2016.