a jar contains 4 green marbles, 5 red marbles and 7 blue marbles. If two are selected randomly, what is the probability of getting :
1)2 red marbles
2)1 blue marble and 1 red marble
3)2 blue marbles?

Question

a jar contains 4 green marbles, 5 red marbles and 7 blue marbles. If two are selected randomly, what is the probability  of getting : 
1)2 red marbles 
2)1 blue marble and 1 red marble 
3)2 blue marbles?

anonymous · Answer

@mathslover please help me

mathslover · Answer

@kittenbalm , I will help only for 1) , which one you want?

anonymous · Answer

2 red

mathslover · Answer

Suppose you have 7 total apples, out of which 3 are ripen, 

can u tell me what is the probability of getting ripen apples when u pick it blindly ?

anonymous · Answer

3/7

mathslover · Answer

similarly, you have, here total marbles = ?

anonymous · Answer

5/16 but im picking two so the next set would be 5/15 because there is no sign of replacement 

the next part is what i need help with im supposed to only have one answer so i have to mutiply this is why i need help the equation looks like this : aCs

anonymous · Answer

@UnkleRhaukus do you think you could help me people keep leaving when i get to the part above and i cant do it by myself

mathslover · Answer

@kittenbalm , I am really very sorry. My net lost the connection. And its again going like that.

@.Sam. may help

anonymous · Answer

i have terenz now but thanks

mathslover · Answer

Great.

anonymous · Answer

thanks for your help though greatly  appreciated