WGU C955 Module 7 Probability – Exam Questions, Practice Problems & Solutions

WGU C955 MODULE 7 PROBABILITY
EXAM QUESTIONS AND ANSWERS
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1 . What is the probability of someone having a birthday in March or
Decem-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


1/ 38

,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


2/ 38

,Female 50 225 IOO 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




3/ 38

, b 0.01
c 0.02
d 0.04: 0.01
5. The following table shows the percentage of events at an arena.

Basketball

Hockey 19%

Concert 18%

Table Tennis 90/0

Other 28%

What is the disjoint probability of having a basketball or hockey
game at the arena?



b 37%



d 55:
4/ 38