n a multiple choice test there are five possible choices one with correct answer, and you truly do not know the answer. What is the probability that if you guess you will choose the correct answer?

Here this is easy

The chances that you guess the answer out of a five choice question is 1/5 or 20% chance here's my math...

5 questions 1 is right 1/5 is 20% because 1/10 is 10% and that's doubled because our number is halved smaller.

Hope this helps!

- (2, -7)

- lines r and s and lines t and u must be parallel

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