Fairview High School has an anime (Japanese animation) club that any student can attend. The relative frequency table shows the proportion of
students in the high school who take Japanese and/or are in the anime club.
Take Japanese
Total
Do not take
Japanese
0.01
0.79
0.15
In anime club
Not in anime club
Total
0.05
0.20
0.16
0.84
1.0
0.80
Given that a student takes Japanese, what is the likelihood that he or she is in
the anime club?
A. 75%
B. 20%
C. About 94%
D. 15%

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages