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Mathematics 14 Online
OpenStudy (anonymous):

The faces of an 8-sided die are numbered from 1 to 8. What is the probability of rolling a 5 three times in ten rolls?

OpenStudy (anonymous):

what's the probability of rolling a 5 once?

OpenStudy (anonymous):

5/6

OpenStudy (anonymous):

how do you get 5/6

OpenStudy (anonymous):

Do you want to learn how to do this or do you just want the answer?

OpenStudy (anonymous):

as you like show me the steps

OpenStudy (anonymous):

what's the probability of rolling a 6 if you're rolling one time?

OpenStudy (anonymous):

1

OpenStudy (anonymous):

you're saying if you roll a die, you have a 100% chance of getting a 6? have you ever tried rolling a die? :-)

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

i'll give you a hint - the probability of getting any result on a die is the same. If I ask you the probability of getting a 2, or a probability of getting a 6, your answer should be the same

OpenStudy (anonymous):

well anyway the answer is 12353145/134217728

OpenStudy (anonymous):

the total answer

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

thnx but i need the steps i know the final answer 0.09

OpenStudy (anonymous):

okay what's the probability of getting a 5 once

OpenStudy (anonymous):

1/6

OpenStudy (anonymous):

that's for a 6 sided die but your problem uses a special die

OpenStudy (anonymous):

1/8

OpenStudy (anonymous):

okay now just plug that into the PDF of the binomial distribution with p=1/8 , n=10 and i=3 and you get .0920381

OpenStudy (anonymous):

thnx so much

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