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# Question 12 2 pts Of the shirts produced by a company, 5% have loose threads, 9%...

Question 12 2 pts
Of the shirts produced by a company, 5% have loose threads, 9% have crooked stitching, and 3.5% have loose threads and crooked stitching. Find the probability that a randomly selected shirt has loose threads or has crooked stitching.

Homework Help:

2VF (1): Probabilities using addition rule from values and from percentages (Links to an external site.) (0:54)

0.5%

14.0%

10.5%

17.5%
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Question 13 2 pts
Randomly select a customer that is happy with the store. Randomly select a customer who infrequently shops at the store. Are these events mutually exclusive?

Homework Help:

2DF. Independent versus dependent events; mutually exclusive and non-mutually exclusive events, complements (Links to an external site.) (DOCX)

Non-mutually exclusive events

Mutually exclusive events
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Question 14 2 pts
In a sample of 800 adults, 228 said that they liked sugar cereals. Three adults are selected at random without replacement. Find the probability that all three like sugar cereals.

Homework Help:

2VG: Probabilities of drawing several from many without replacement, all or none outcomes (Links to an external site.) (2:16)

2DH. Probabilities of drawing several from many without replacement, all or none outcomes (Links to an external site.) (DOCX)

9.50%

2.29%

2.31%

3.17%
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Question 15 2 pts
In a sample of 80 adults, 24 said that they would buy a car from a friend. Three adults are selected at random without replacement. Find the probability that none of the three would buy a car from a friend.

Homework Help:

2VG: Probabilities of drawing several from many without replacement, all or none outcomes (Links to an external site.) (2:16)

2DH. Probabilities of drawing several from many without replacement, all or none outcomes (Links to an external site.) (DOCX)

34.00%

2.46%

33.74%

24.60%

12)
probability that a randomly selected shirt has loose threads or has crooked stitching= 0.05+0.09-0.035=   0.105   or 10.5%

13)  Non-mutually exclusive events

14) P(X=3)= C(228,3)*C (572,0)/C(800,3)           =   0.0229 or 2.29%

15) P(X=0)= C(24,0)*C (56,3)/C(80,3)           =   0.3374 or 33.74%

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