Thread: Probablilty-with marbles!

A jar contains 3 blue, 4 green, and 5 yellow marbles. if a set of three marbles is chosen at random from the jar, find the probablilty that your selectiona contains:


a) at least 1 blue marble.


Okay nvm. i got it.
thank you in advance.

What have you tried?

Originally Posted by questiongirl

A jar contains 3 blue, 4 green, and 5 yellow marbles. if a set of three marbles is chosen at random from the jar, find the probablilty that your selectiona contains:

a) 3 marbles, not all of which are blue
b) 1 marble of each color
c) at least 1 blue marble.

thank you in advance!

Try drawing a tree diagram.

of course i have tried.but not the tree diagram.. im actually having more diffculty in at least 1 blue marble.