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Homework 19
Question
If the odds are 18 to 5 against success, then the probability of success is:
Answer
5/23 = 21.74%
5/18 = 27.78%
5/13 = 38.46%
13/18 = 72.22%
18/23 = 78.26%
Question
A six sided die (like with a Monopoly or Yahtzee game) is put into a microwave on low power in hopes of making it no longer
be fair.
The chances of each side are now:
P(1)=0.1
P(2)=0.15
P(3)=0.15
P(4)=0.15
P(5)=0.15
P(6)=?
What is the probability of a 6?
Answer
0.05
0.10
0.20
0.25
0.30
Question
Which of the following is a valid probability model?
Answer
P(A)=0.6
P(B)=0.5
P(C)=0.1
P(A)=1.0
P(B)=0.0
P(C)=0.0
P(A)=0.3
P(B)=0.3
P(C)=0.3
P(A)=0.25
P(B)=0.25
P(C)=0.6
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View Full Document Homework 20
Question
70% of students in a class are from instate.
60% of students in a class are female.
45% of the students are instate females.
What percent of students are from outofstate?
Answer
15%
30%
35%
42%
85%
Question
What percent are either instate or female (or both)?
Answer
15%
30%
35%
42%
85%
Question
What percent are outofstate females?
Answer
15%
30%
35%
42%
85%
Question
A dart player has a 30% chance of getting a bull'seye on the first throw.
If the first throw is a bull'seye they have a
45% chance of getting one on the second throw.
If the first throw didn't hit the bull'seye they have a 15% chance of getting
one on the second throw.
What is the probability of getting at least one bull's eye?
Answer
0.27 = 27%
0.4 = 40%
0.405 = 40.5%
0.595 = 59.5%
0.6 = 60%
0.73 = 73%
Question
What is P(missing bull'seye on second  hit bull'seye on first) ?
Answer
0.15 = 15%
0.165 = 16.5%
0.3 = 30%
0.45 = 45%
0.55 = 55%
0.85 = 85%
Question
A dart player has a 30% chance of getting a bull'seye on the first throw. If the first throw is a bull'seye they have a
45% chance of getting one on the second throw.
If the first throw didn't hit the bull'seye they have a ____% chance of getting
one on the second throw.
If the second throw is independent of the result of the first throw, what value would have to go where the blank is?
Answer
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This note was uploaded on 02/22/2012 for the course STAT 110 taught by Professor Johnson during the Fall '07 term at South Carolina.
 Fall '07
 JOHNSON
 Probability

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