Question

Suppose you choose a marble from a bag containing 2 red marbles, 5 white marbles, and 3 blue marbles. You return the first marble to the bag and then choose again. Find P(red and blue).

Answer 1

What's P(red)? What's P(blue)?
As long as you're putting the marble back you can just multiply them.

Answer 2

find P probability that a red and blue marble will be chosen)

Answer 3

Right. So what is P(red)?
There are 2 red marbles and 2+5+3=10 marbles in total.
So it's 2/10 = 0.2

Now what's P(blue)?

Answer 4

well, i think it means red and blue together, what would the probability be if they were combined.

Answer 5

I know. I'm showing you how to figure out.
The questions are for you to answer. :P

Answer 6

ooooh

Answer 7

sorry im not the brightest

Answer 8

So.. what's P(blue)? :D

Answer 9

3/10

Answer 10

Yes.

When two events are independent like this, you can find P(A and B) by just multiplying them. So if you know P(red) and P(blue) you can figure out P(red and blue) by multiplying them together.

Answer 11

oh my goodness, thank you.

Answer 12

i was kind of confused on how these things went, so this was really helpful.

Answer 13

Good. :D

Answer 14

<3