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Mathematics 20 Online
OpenStudy (anonymous):

A number cube is labeled 1 through 6. What is the probability of rolling a 3? Write your answer as a fraction in simplest form.

OpenStudy (apoorvk):

Okay what do you think are the possibilities when you roll a cube or die?

Parth (parthkohli):

Okay, \(\Large \color{midnightblue}{\rightarrow P(\text{rolling a 3}) = {\text{Number of PREFERRED outcomes} \over \text{Total Number of outcomes}} }\)

OpenStudy (apoorvk):

*A DIE

Parth (parthkohli):

What are the preferred outcomes?

OpenStudy (anonymous):

1/6

Parth (parthkohli):

Yes :)

OpenStudy (anonymous):

so would it be 1/3

Parth (parthkohli):

No, 1/6

Parth (parthkohli):

Preferred number of outcomes = 1 {3} Total outcomes = 6 {1,2,3,4,5,6} I told you the formula for probability

OpenStudy (apoorvk):

1,2,3,4,5,6 are the possible outcomes. that is 6 possible outcomes. you need a '3'. that is one 'preferred' outcome as Parth said. So, P = 1/6

OpenStudy (anonymous):

thanks

OpenStudy (apoorvk):

Wels :p

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