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Mathematics 13 Online
OpenStudy (anonymous):

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OpenStudy (ddcamp):

What's the probability that the first bead she draws is red? (ignoring the next two for now)

OpenStudy (anonymous):

idk like 1/2 because Idk how many total colors there are. Ik theres white and red

OpenStudy (ddcamp):

Look at the first line again: "but all are different colors."

OpenStudy (anonymous):

oh 1/8

OpenStudy (ddcamp):

Yup!

OpenStudy (ddcamp):

So, what's the probability that the second bead is white? That the third bead is red?

OpenStudy (anonymous):

It'll be the same right? 1/8?

OpenStudy (ddcamp):

Yes. So, when you have multiple things, and you want to find the probability of them all happening, what do you do with the probabilities of each individual event?

OpenStudy (anonymous):

Multiply?

OpenStudy (ddcamp):

Yup.

OpenStudy (anonymous):

So 1/8 x 1/8 x 1/8?

OpenStudy (ddcamp):

Yup!

OpenStudy (anonymous):

1/8 x 1/8= 1/64 and then x 1/8 = 1/512.

OpenStudy (ddcamp):

Yes, and that's one of the answers!

OpenStudy (anonymous):

I'm gonna go with 1/512 because 1/8 x 1/8 is 1/64, but not 3 times

OpenStudy (anonymous):

Like u need to multiply 1/8 again

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