taniatafoya
New member
- Joined
- Oct 5, 2011
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- 1
in a jar there are 2 blue marbles 3 red marbles and 6 black marbles when picking one marble at a time and keep picking it how likely is it that 2 blck marbles will be pulled?
help please(:
- Thread starter taniatafoya
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Unknown008
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- Sep 6, 2011
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Probability is given by the number of 'things' you're looking for, divided by the total number of 'things'.
In your case, the things are marbles and what you want, are black marbles.
The first time to pick marbles, how many black marbles are there? How many total marbles?
If you understood what to do, you should get the probability of getting one black marble. Can you post what you get? When you're done with this, we'll see how to get the next black marble.
In your case, the things are marbles and what you want, are black marbles.
The first time to pick marbles, how many black marbles are there? How many total marbles?
If you understood what to do, you should get the probability of getting one black marble. Can you post what you get? When you're done with this, we'll see how to get the next black marble.