Answer:
<u>A. P = 7/25 </u>
<u>B. P = 19/116</u>
<u>C. P = 28/125</u>
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly this way:
<u> Juniors Seniors Totals</u>
Yes 28 97 125
No 56 19 75
<u>Totals</u> 84 116 200
2. Find the probability of each of the events.
Let's recall that the formula of probability is:
P = Number of favorable outcomes/Total number of possible outcomes
A. P (a junior who did not attend prom)
P = Juniors who did not attend prom/Total number of students surveyed
P = 56/200
P = 7/25 (Diving by 8 numerator and denominator)
B. P (did not attend prom | senior)
P = Seniors who did not attend prom/Total number of seniors surveyed
P = 19/116
C. P (junior | attended prom)
P = Juniors who attend prom/Total number of students attended prom
P = 28/125