WGU C955 - Module 7: Probability
Study online at https://quizlet.com/_8fce26
1. What is the probability of someone having a birthday in March or Decem-
ber?
a 1/6
b 1/4
c 1/3
d 1/2: 1/6
2. The table below shows the breakdown of workers at a business. What is the
probability of selecting a worker who is over 45 years of age to the nearest
hundredth?
Age
1825 2644 45+ Total
Male 75 200 125 400
Female 50 225 100 375
Total 125 425 225 775
a 0.16
b 0.29
c 0.42
d 0.55: 0.29
3. The table below shows the breakdown of workers at a business. What is
the probability that a randomly selected 1825 year old is male (to the nearest
hundredth)?
Age
1825 2644 45+ Total
Male 75 200 125 400
Female 50 225 100 375
Total 125 425 225 775
a 0.48
b 0.52
c 0.56
d 0.60: 0.60
4. The probability that Jimmy attends school on any given day is 0.98 . The
probability Jimmy misses a day of school, given that he missed the day before,
is 0.5 . What is the probability that Jimmy misses school on BOTH Tuesday and
Wednesday?
a 0.0004
, WGU C955 - Module 7: Probability
Study online at https://quizlet.com/_8fce26
b 0.01
c 0.02
d 0.04: 0.01
5. The following table shows the percentage of events at an arena.
Basketball 26%
Hockey 19%
Concert 18%
Table Tennis 9%
Other 28%
What is the disjoint probability of having a basketball or hockey game at the
arena?
a 27%
b 37%
c 45%
d 55: 45%
6. A game has a 10 -sided fair die. What is the probability of rolling an even
number or a number less than 5 ?
a 1/10
b 3/10
c 7/10
d 9/10: 7/10
7. A survey on favorite pizza topping was given: 33% said cheese was their
favorite topping, 25% said pepperoni, 15% said sausage, and 27% said other.
If two people are picked at random and replaced, what is the probability of
picking two people that like cheese? Round your answer to a whole number.
a 0%
b 11%
c 33%
d 66%: 11%
8. There was a marble drawn from a bag in an experiment and placed back in
the bag repeatedly. A red marble appeared 45 times, a blue marble 70 times,
a green marble 63 times, and a black marble 22 times. What is the empirical
probability of the blue marble?
a 0.11
, WGU C955 - Module 7: Probability
Study online at https://quizlet.com/_8fce26
b 0.225
c 0.315
d 0.35: 0.35
9. In a bag, there are 8 red marbles, 10 blue marbles, 9 green marbles, and 5
black marbles. Find the theoretical probability of drawing a red marble out of
the bag.
a 5/32
b 1/4
c 9/32
d 5/16: 1/4
10. What is the sample size for choosing an odd number between 1 and 75 ,
including the numbers 1 and 75 ?
a 37
b 38
c 39
d 40: 38
11. There are black, blue, and white marbles in a bag. The probability of
choosing a black marble is 0.36 . The probability of choosing a black and then
a white marble is 0.27 . To the nearest hundredth, what is the probability of the
second marble being white if the first marble chosen is black?
a 0.27
b 0.39
c 0.75
d 0.86: 0.75
12. There are 10 blue, 10 red, and 10 green labels in a bag. The labels are drawn
from the bag and not replaced. What is the probability of drawing a blue first,
and not blue second to the nearest percent?
a 22%
b 23%
c 32%
d 33%: 23%
13. The numbers 110 are in a bag and two are drawn without replacement. What
is the probability of drawing an even number first, and a 1 second?
a 1/2
Study online at https://quizlet.com/_8fce26
1. What is the probability of someone having a birthday in March or Decem-
ber?
a 1/6
b 1/4
c 1/3
d 1/2: 1/6
2. The table below shows the breakdown of workers at a business. What is the
probability of selecting a worker who is over 45 years of age to the nearest
hundredth?
Age
1825 2644 45+ Total
Male 75 200 125 400
Female 50 225 100 375
Total 125 425 225 775
a 0.16
b 0.29
c 0.42
d 0.55: 0.29
3. The table below shows the breakdown of workers at a business. What is
the probability that a randomly selected 1825 year old is male (to the nearest
hundredth)?
Age
1825 2644 45+ Total
Male 75 200 125 400
Female 50 225 100 375
Total 125 425 225 775
a 0.48
b 0.52
c 0.56
d 0.60: 0.60
4. The probability that Jimmy attends school on any given day is 0.98 . The
probability Jimmy misses a day of school, given that he missed the day before,
is 0.5 . What is the probability that Jimmy misses school on BOTH Tuesday and
Wednesday?
a 0.0004
, WGU C955 - Module 7: Probability
Study online at https://quizlet.com/_8fce26
b 0.01
c 0.02
d 0.04: 0.01
5. The following table shows the percentage of events at an arena.
Basketball 26%
Hockey 19%
Concert 18%
Table Tennis 9%
Other 28%
What is the disjoint probability of having a basketball or hockey game at the
arena?
a 27%
b 37%
c 45%
d 55: 45%
6. A game has a 10 -sided fair die. What is the probability of rolling an even
number or a number less than 5 ?
a 1/10
b 3/10
c 7/10
d 9/10: 7/10
7. A survey on favorite pizza topping was given: 33% said cheese was their
favorite topping, 25% said pepperoni, 15% said sausage, and 27% said other.
If two people are picked at random and replaced, what is the probability of
picking two people that like cheese? Round your answer to a whole number.
a 0%
b 11%
c 33%
d 66%: 11%
8. There was a marble drawn from a bag in an experiment and placed back in
the bag repeatedly. A red marble appeared 45 times, a blue marble 70 times,
a green marble 63 times, and a black marble 22 times. What is the empirical
probability of the blue marble?
a 0.11
, WGU C955 - Module 7: Probability
Study online at https://quizlet.com/_8fce26
b 0.225
c 0.315
d 0.35: 0.35
9. In a bag, there are 8 red marbles, 10 blue marbles, 9 green marbles, and 5
black marbles. Find the theoretical probability of drawing a red marble out of
the bag.
a 5/32
b 1/4
c 9/32
d 5/16: 1/4
10. What is the sample size for choosing an odd number between 1 and 75 ,
including the numbers 1 and 75 ?
a 37
b 38
c 39
d 40: 38
11. There are black, blue, and white marbles in a bag. The probability of
choosing a black marble is 0.36 . The probability of choosing a black and then
a white marble is 0.27 . To the nearest hundredth, what is the probability of the
second marble being white if the first marble chosen is black?
a 0.27
b 0.39
c 0.75
d 0.86: 0.75
12. There are 10 blue, 10 red, and 10 green labels in a bag. The labels are drawn
from the bag and not replaced. What is the probability of drawing a blue first,
and not blue second to the nearest percent?
a 22%
b 23%
c 32%
d 33%: 23%
13. The numbers 110 are in a bag and two are drawn without replacement. What
is the probability of drawing an even number first, and a 1 second?
a 1/2
