10) In a large bag of marbles, 30% of them are red. A child chooses 4 marbles from this bag. If the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles? A) 0.108 B) 0.176 C) 0.076 D) 0.265 f people take the
10) In a large bag of marbles, 30% of them are red. A child chooses 4 marbles from this bag. If the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles? A) 0.108 B) 0.176 C) 0.076 D) 0.265 f people take the
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 6ECP: In Pennsylvania’s Cash 5 game, a player chooses five different numbers from 1 to 43. If these five...
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Transcribed Image Text:10) In a large bag of marbles, 30% of them are red. A child chooses 4 marbles from this
bag. If the child chooses the marbles at random, what is the chance that the child gets
exactly three red marbles?
A) 0.108
B) 0.176
11) The failure rate for taking the bar exam in Philadelphia is 41%. If 375 people take the 11)
bar exam, what is the mean for the number of failures?
A) 90.7
B) 138.1
C 153.8
C) 0.076
pen+BEAR
12) A computer store has 75 printers of which 35 are laser printers and 40 are ink jet
printers. If a group of 10 printers is chosen at random from the store, find the mean of
the number of ink jet printers.
A) 2.5
B) 1.6
D 4.7
B) 0.086
C) 5.3
VINIC
13) A certain large manufacturing facility produces 20,000 parts each week. The manager
of the facility estimates that about 1% of the parts they make are defective. What is the
variance for the number of defective parts made each week?
A) 200
B) 14.1
C) 138
(D) 198
B) 0.312
17) Find the probability P(X; 2): P(3, 8)
A) 0.9714
B) 0.0013
dile insan
D) 0.265
2
14) It is estimated that 40% of households own a riding lawn mower. A sample of 20
households is studied. What is the standard deviation of the number of households who
INGT (20) (-40) (1 - 140) = 14.8 = 2.19089
own a riding lawn mower?
B) 4.8
A) 2.1909
C) 8
D) 20
D) 221.3
2.0(8
15) The probability that federal income tax returns will have 0, 1, or 2 errors is 0.73, 0.23,
and 0.04, respectively. If 10 randomly selected returns are audited, what is the
probability that eight will have no errors, two will have one error, and none will have
two errors?
A) 0.192
C) 0.043
C) 0.3750
16) On a Saturday evening in Chicago, 34% of the people go out to dinner, 18% go out to
see a movie, 13% go out to a party, and 35% stay home. If five people are randomly
selected on Monday morning, what is the probability that all but one went out Saturday
night?
A) 0.181
C) 0.116
10) B
D) 0.384
D) 0.048
D) 0.0286
12) _D__
13) D
14) A
15)
16)
17)
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