# Math

A true-false test has 5 questions. What is the probability of guessing the correct answers to all of the questions?

A. 1/25****
B. 1/10
C. 1/32
D. 1/7

1. 👍
2. 👎
3. 👁
1. Prob(Right) = 1/2

In 5 problems you want RRRRR
prob(RRRRR) = (1/2)^5 = 1/32

1. 👍
2. 👎
👤
Reiny
2. 2*2*2*2=2^5..... By multiplying 2 Five times and and the root number 5... the probability of answering ll of them correct is 1/23.

: )

1. 👍
2. 👎

## Similar Questions

1. ### Statistics Algebra 2

A 10-question multiple choice test has 4 possible answers for each question. A student guesses on all ten answer. a)What is the probability that the student selects at least 6 correct answers? b)Is getting exactly 10 questions

2. ### Math, HELP ME!

What is the experimental probability of the spinner landing on red? a. 1/2 b. 1/3 c. 1/4 *** What is the experimental probability of the spinner landing on blue? a. 2/7 b. 1/4 *** c. 2/9 There’s a spinner with 8 sections in

3. ### math stats

A true-false test consists of 50 questions. how many does a student have to get right to convince you that he is not merely guessing Explain

4. ### statistics

A multiple choice test has 20 questions with each having 4 possible answers with one correct. Assume a student randomly guesses the answer to every question. 1) What is the probability of getting exactly 9 correct answers? 2)What

1. ### Math (check answer plz)

13. A true-false test has 12 questions. What is the probability of guessing the correct answers to all of the questions? (1 point) A: 1 over 4096*******? B: 1 over 144 C: 1 over 24 D: 1 over 14

2. ### Math (pre-celc 12)

A true false test has 15 questions. How many answer keys are possible of the answer to 6 of the questions is false and 9 are true? I think this is a permutation and not a combination because each answer key would be different

3. ### mathematics

A quiz consists of 4 true-false questions. What is the probability of getting 100% on the quiz by randomly guessing the answer to all 4 questions? 1/4 1/16 1/2 2/5

4. ### Physical Ed

11. Disagreements are a normal part of life. (1 point) True False 12. Talking to a trustworthy adult is the best way to stop sexual abuse and get help. (1 point) True False 13. Some conflicts are made worse by peer negotiation. (1

1. ### probability

What is the probability of getting 80% or more of the questions correct on a 10-question true-false exam merely by guessing? probability - Damon, Wednesday, March 6, 2013 at 2:53am Binomial distribution with p = .5 p(10 right) =

2. ### English

1.) Anyone can publish information on the Internet without fact-checking it. A.) True************************ B.) False 2.) Public records are most likely to contain valid information than secondhand reports. A.)

3. ### statistics

a test consists of true/false questions .to pass the test a student must answer at least 6questions correctly .if a student guesses on each question,what is the probability that the student will pass the test

4. ### Statistics

A student takes true or false test consisting of 10 questions by just guessing at each answer. Find the probability that the student's score will be 80% or more?