Concept explainers
a)
To find
a)
Answer to Problem 19E
The probability that car no repairs = 72%
Explanation of Solution
Given:
P(Once repair) = 17% = 0.17
P(Twice repair) = 7% = 0.07
P(Thrice or more) = 4% = 0.04
Formula:
Complement rule:
Now,
Hence, probability that car no repairs is 0.72
b)
To find probability that car no more than one repair.
b)
Answer to Problem 19E
The probability that car no more than one repair = 89%
Explanation of Solution
Given:
P(Once repair) = 17% = 0.17
P(Twice repair) = 7% = 0.07
P(Thrice or more) = 4% = 0.04
P(No repair) = 0.72
Formula:
Addition rule:
Hence, probability that car no more than one repair is 89%
c)
To find probability that car has some repairs.
c)
Answer to Problem 19E
The probability that car has some repair is 28%
Explanation of Solution
Given:
P(Once repair) = 17% = 0.17
P(Twice repair) = 7% = 0.07
P(Thrice or more) = 4% = 0.04
P(No repair) = 0.72
Formula:
Addition rule:
Hence, probability that car has some repair is 28%
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