Question

An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to...

An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following result was obtained.

Did Well on Midterm

Did Poorly on Midterm

Studying for Exam

80

20

Went Bar Hopping

30

70

Using the Table above,

(a) Suppose a randomly selected student who went bar hopping, what is the probability that

   he/she will do well on the midterm?

(b) Find the probability that a randomly selected student did well on the midterm or went bar

hopping the weekend before the midterm?

(c) Determine the probability that a randomly selected student did well on the midterm and also went bar hopping the weekend before the midterm?

Math   Statistics-And-Probability   
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Answer #1

TOPIC:Classical definition of probability,Additive law and conditional law of probability.

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