)A bag contains 40 marbles, 4 of which are blue, 10 are red, 25 are green, and 1 is purple. Shawna takes a marble out of the bag, records the color, and returns it to the bag. How many green marbles should she expect after 400 trials?
25
40
100
250
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OpenStudy (anonymous):
@BloomLocke367
OpenStudy (anonymous):
i will fan and medal
OpenStudy (pinklion23):
maybe i can help
OpenStudy (anonymous):
ok
OpenStudy (bloomlocke367):
okay... you need to find out how many green marbles there are and how many total marbles there are...
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OpenStudy (anonymous):
there is 25 green and 40 total
OpenStudy (bloomlocke367):
well it's already there, but you get the point XD
OpenStudy (bloomlocke367):
you could write a proportion...
OpenStudy (anonymous):
there is 25 over 40 right
OpenStudy (anonymous):
25 out of 40
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OpenStudy (bloomlocke367):
\[\frac{ 25 }{ 40 }=\frac{? }{400}\] yep!
OpenStudy (bloomlocke367):
do you know how to solve for the '?'
OpenStudy (anonymous):
i multiply right
OpenStudy (bloomlocke367):
yes.. you cross-multiply and divide :)
OpenStudy (anonymous):
thanks
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OpenStudy (bloomlocke367):
what do you get?
OpenStudy (anonymous):
have a good day bloom
OpenStudy (bloomlocke367):
you too. \(\Huge\mathbb{\color{lime}{GREAT~WORK}}\)