MEDAL AND FAN

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?

A. 5/12 . 5/12

B. 5/12 . 4/12

C. 5/12 . 5/11

D. 5/12 . 4/11

Question

MEDAL AND FAN

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?
 
 A. 5/12 . 5/12
 
 
 B. 5/12 . 4/12
 
 
 C. 5/12 . 5/11
 
 
 D. 5/12 . 4/11

anonymous · Answer

D

cwrw238 · Answer

what is the probability that she picks a red on the first draw?

anonymous · Answer

Im right

cwrw238 · Answer

yes you are right but plz dont just give the answer

cwrw238 · Answer

as there are 5 reds and 7 white  - a total of 12 cubes then P( pick e red) = 5/12

cwrw238 · Answer

after one red is put into the pocket we have 11 cubes left of which 4 are red
so P( red) = 4/11

cwrw238 · Answer

so we have 2 events -  the 2 draws from the bag - and they are independent events . Independent because one event cannot have any effect on the other. In this case the individual probabilities are multiplied

so the required probability    =  5/12 * 4/11

winsteria · Answer

Thank You

cwrw238 · Answer

yw