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briana.img
 one year ago
Someone help me understand this problem?
briana.img
 one year ago
Someone help me understand this problem?

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briana.img
 one year ago
Best ResponseYou've already chosen the best response.0A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a green marble, do not replace it, and pick a red marble?

Owlcoffee
 one year ago
Best ResponseYou've already chosen the best response.1Well, I believe these are two scenarios. First calculate the probability you have to pick a green marble, you count all the marbles and and the green marbles: \[\frac{ 4 }{ 10 }.100\]

Owlcoffee
 one year ago
Best ResponseYou've already chosen the best response.1it's there by mere definition, but it's a formula that gives you the probability.

Owlcoffee
 one year ago
Best ResponseYou've already chosen the best response.1You have to first perform the division, remember that.

Owlcoffee
 one year ago
Best ResponseYou've already chosen the best response.1Good, now, that gives the probability you would have to get a green marble, now, you won't put it back in the bag, so now you have a total of 9 marbles inside the bag. What would be the probability to find a red marble in the new quatity?: \[\frac{ 3 }{ 9 }.100\]

perl
 one year ago
Best ResponseYou've already chosen the best response.1Better not multiply by a 100. Only if you want to convert the final answer to a percentage $$ \Large \sf Probability = \frac {4}{10}\cdot \frac{3}{9}$$

briana.img
 one year ago
Best ResponseYou've already chosen the best response.0awwwh okay thank you! i'll look at this next time i have trouble with this

Owlcoffee
 one year ago
Best ResponseYou've already chosen the best response.1Haha, I was doing it by parts, but thanks, perl.

briana.img
 one year ago
Best ResponseYou've already chosen the best response.0@perl @Owlcoffee so for the problem A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a blue marble, replacing it, and then picking another blue marble? the answer would be 4/25 ?
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