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Mathematics 6 Online
OpenStudy (anonymous):

Can someone please help!? D:

OpenStudy (anonymous):

OpenStudy (anonymous):

there may be more than one answer, but 1) is true because \[P(A)=\frac{1}{6},P(B)=\frac{1}{2}\] and since they are independent, \[P(A\cap B)=\frac{1}{6}\times \frac{1}{2}=\frac{1}{12}\]

OpenStudy (anonymous):

It is multiple choice, like, select all that apply

OpenStudy (anonymous):

in fact, from what i have written above, we see that all are true except C

OpenStudy (anonymous):

I just really don't get any of it lol

OpenStudy (anonymous):

How is C not true?

OpenStudy (anonymous):

you roll a die how many sides does it have?

OpenStudy (anonymous):

6

OpenStudy (anonymous):

how many sides has a 5 on it?

OpenStudy (anonymous):

1?

OpenStudy (anonymous):

right what is the probability therefore that you "roll a 5"?

OpenStudy (anonymous):

1/6

OpenStudy (anonymous):

k so you got that one right? \(P(A)=\frac{1}{6}\)

OpenStudy (anonymous):

how many of the sides have even numbers on them?

OpenStudy (anonymous):

3

OpenStudy (anonymous):

k good so what is the probability that you roll an even number?

OpenStudy (anonymous):

3/6

OpenStudy (anonymous):

right, reduce

OpenStudy (anonymous):

1/2

OpenStudy (anonymous):

k so \(P(B)=\frac{1}{2}\) seems like you are not having too much trouble

OpenStudy (anonymous):

No lol I get it all now. Thanks man you always help me decent lol

OpenStudy (anonymous):

in fact i would argue that it is rather straight forward right? the only thing left to understand it that \(A\cap B\) means the first die is a 5 and the second is even,and to find \(P(A\cap B)\) you multiply the two numbers together, giving \[P(A\cap B)=\frac{1}{6}\times \frac{1}{2}=\frac{1}{12}\]

OpenStudy (anonymous):

yw

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