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a.
Find the
a.
Answer to Problem 64CE
The probability of selecting a family that prepared their own taxes is 0.50.
Explanation of Solution
Calculation:
The total number of families is 20 and the number of families prepared their own taxes is 10, the number of families prepared their taxes by a local professional is 7 and the number of families prepared by H&R block is 3.
The probability of selecting a family that prepared their own taxes is obtained as follows:
Thus, the probability of selecting a family that prepared their own taxes is 0.50.
b.
Find the probability that selecting two families, both of which prepared their own taxes.
b.
Answer to Problem 64CE
The probability that selecting two families, both of which prepared their own taxes is 0.2368.
Explanation of Solution
Calculation:
The probability that selecting two families, both of which prepared their own taxes is obtained as follows:
Thus, the probability that selecting two families, both of which prepared their own taxes is 0.2368.
c.
Find the probability of selecting three families, all of which prepared their own taxes.
c.
Answer to Problem 64CE
The probability of selecting three families, all of which prepared their own taxes is 0.1053.
Explanation of Solution
Calculation:
The probability of selecting three families, all of which prepared their own taxes is obtained as follows:
Thus, the probability of selecting three families, all of which prepared their own taxes is 0.1053.
d.
Find the probability that selecting two families, neither of which had their taxes prepared by H&R block.
d.
Answer to Problem 64CE
The probability that selecting two families, neither of which had their taxes prepared by H&R block is 0.7158.
Explanation of Solution
Calculation:
The number of families prepared by H&R block is 3 and the total number of families is 20.
The probability that selecting two families, neither of which had their taxes prepared by H&R block is obtained as follows:
Thus, the probability that selecting two families, neither of which had their taxes prepared by H&R block is 0.7158.
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Chapter 5 Solutions
STATISTICAL TECHNIQUES-ACCESS ONLY
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