Exercise 2.1 (Sample Space and Events) The rise times (unit: min.) of a reactor for two batches are measured in an experiment. 1. Define the sample space of the experiment. 2. Define Ei where the reactor rise time of the first batch is less than 55 min. and E2 where the reactor rise time of the second batch is greater than 70 min. 3. Find E¡ U E2, E1 N E2, and E1'. 4. Are Ei and E2 mutually exclusive? 5. Are Ei and E2 exhaustive?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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ELABORATE
Answer the following problems showing complete solution.
Enclose final answers.
ELABORATE
Exercise 2.1 (Sample Space and Events) The rise times (unit: min.) of a reactor for
two batches are measured in an experiment.
1. Define the sample space of the experiment.
2. Define Ei where the reactor rise time of the first batch is less than 55 min. and
E2 where the reactor rise time of the second batch is greater than 70 min.
3. Find E¡ U E2, Ei N E2, and Ei'.
4. Are Ei and E2 mutually exclusive?
5. Are Ei and E2 exhaustive?
Exercise 2.2 (Probability of Joint Event) Test results of scratch resistance and shock
resistance for 100 disks of polycarbonate plastic are as follows:
Shock Resistance
High (B)
Low (B’)
Scratch
Resistance
High (A)
Low (A')
80
6
5
Let A and A' denote the event that a disk has high scratch resistance and the
event that a disk has low scratch resistance, respectively. Let B and B' denote
the event that a disk has high shock resistance and the event that a disk has low
shock resistance, respectively.
1. When a disk is selected at random, find the probability that both the scratch
and shock resistances of the disk are high.
2. When a disk is selected at random, find the probability that the scratch or
Transcribed Image Text:ELABORATE Answer the following problems showing complete solution. Enclose final answers. ELABORATE Exercise 2.1 (Sample Space and Events) The rise times (unit: min.) of a reactor for two batches are measured in an experiment. 1. Define the sample space of the experiment. 2. Define Ei where the reactor rise time of the first batch is less than 55 min. and E2 where the reactor rise time of the second batch is greater than 70 min. 3. Find E¡ U E2, Ei N E2, and Ei'. 4. Are Ei and E2 mutually exclusive? 5. Are Ei and E2 exhaustive? Exercise 2.2 (Probability of Joint Event) Test results of scratch resistance and shock resistance for 100 disks of polycarbonate plastic are as follows: Shock Resistance High (B) Low (B’) Scratch Resistance High (A) Low (A') 80 6 5 Let A and A' denote the event that a disk has high scratch resistance and the event that a disk has low scratch resistance, respectively. Let B and B' denote the event that a disk has high shock resistance and the event that a disk has low shock resistance, respectively. 1. When a disk is selected at random, find the probability that both the scratch and shock resistances of the disk are high. 2. When a disk is selected at random, find the probability that the scratch or
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