oh no, no the marble question

Sequences, counting (including probability), logic and truth tables, algorithms, number theory, set theory, etc.
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oh no, no the marble question

Postby teddybear101 » Wed Mar 17, 2010 11:32 pm

ok, well it feels good to come back to math, i have not been to this site in ages. so in my math class we are learning about those problems where you have abag of marbles and you are asked what the probability would be if you took a marble out that was a certain color, well here is where my question on a homework sheet plays into all of this.

Question: There is a bag of marbles that has 4 green marbles, 3 blue marbles, and 5 pink marbles. what would be the probability of picking a blue marble, replacing it, and then picking out pink marble?

Answer: well i know that the total number of marbles in the bag is 12. i also know that there are 3 out of 12 blue marbles, and 5 out of 12 pink marbles.

3/12 X 5/12 = 15/144= 5/48

is how i solve this problem corecct or did i make a mistake? help me!!!! :confused:

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Re: oh no, no the marble question

Postby maggiemagnet » Thu Mar 18, 2010 3:03 am

Your numbers look good to me. :thumb:

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