A bag contains 5 red cubes and 7 white cubes. Celinda will select one cube, put it in her pocket, and then select a second cube.
Which expression gives the probability that she will select two red cubes?

- gabbyalicorn

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- gabbyalicorn

posting options give me a sec

- pinklion23

ok

- gabbyalicorn

|dw:1433283481138:dw|

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## More answers

- gabbyalicorn

oh sorry wait lemme just fix it

- pinklion23

here is have to go but @gaos can help you

- gabbyalicorn

|dw:1433283551079:dw| okay well thanks for your help :)

- pinklion23

i have to go but he will help you :)

- gabbyalicorn

@gaos

- gabbyalicorn

@MonKiwi

- anonymous

Hello

- gabbyalicorn

hi!

- Black_ninja123

I think It will be b

- gabbyalicorn

why do you say that?

- Black_ninja123

First you select one cube the fraction is 5/12
after you select the other the cube you already used one so the fraction is 4/12
5-1=4

- gabbyalicorn

then it would be 4/12

- Black_ninja123

yes

- gabbyalicorn

but 4/12 is not on there except for b

- Black_ninja123

Why can't it be c though?

- freeG13

Um so you take one out of 12 and it is red also is 5/12 then you pick again and red it is 4 /11

- Black_ninja123

so its c?

- Black_ninja123

i mean d

- gabbyalicorn

i thought u knew @Black_ninja123

- freeG13

so I would think D

- Black_ninja123

I'm confused between b and d

- gabbyalicorn

:/

- gabbyalicorn

@gaos

- Black_ninja123

D would be the correct answer

- anonymous

First you divide
(What you want)/(what you've got)
So
5/12
Then multiply it by
(What you want)/(what you've got) but remember that one ball has gone
4/11
Then multiply both numbers
5/12.4/11

- freeG13

so you start out with 15 cubes but you take one (red and put it in your pocket then you pick again with 14 cubes and take one again (red)

- gabbyalicorn

its |dw:1433284220561:dw| from what @gaos said

- freeG13

5 out of 12 then 4 out of 11

- freeG13

D yes

- gabbyalicorn

okay i have one more... just one more

- anonymous

Yes

- freeG13

fire away!

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