horsegal244
  • horsegal244
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?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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horsegal244
  • horsegal244
@Michele_Laino @hartnn
Michele_Laino
  • Michele_Laino
the experimental frequency to get a green marble is: 25/40= 5/8 so the requested number is: \[\Large \frac{5}{8} \cdot 400 = ...?\]
horsegal244
  • horsegal244
640?

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Michele_Laino
  • Michele_Laino
hint: \[\Large \frac{5}{8} \cdot 400 = \frac{{5 \cdot 400}}{8} = ...?\]
horsegal244
  • horsegal244
\[\frac{ 2000 }{ 8 }\]= 25
Michele_Laino
  • Michele_Laino
more precisely it is 250
horsegal244
  • horsegal244
ok
horsegal244
  • horsegal244
Can u help me with 3 more?
Michele_Laino
  • Michele_Laino
yes!
horsegal244
  • horsegal244
Michele_Laino
  • Michele_Laino
here the experimental probability, is given by the subsequent ration: favorable outcomes/total outcomes: \[\Large \frac{{272}}{{600}} = ...?\]
Michele_Laino
  • Michele_Laino
ratio*
horsegal244
  • horsegal244
2.205
Michele_Laino
  • Michele_Laino
whereas the theoretical probability is: favorable outcomes (= 3, since there are three odd numbers) / possible outcomes(=6, since there are six possible outcomes): \[\Large \frac{3}{6} = ...?\]
horsegal244
  • horsegal244
2?
horsegal244
  • horsegal244
ohhh 1/2 duhhhh
Michele_Laino
  • Michele_Laino
we have: 272/600=0.453 and 3/6=0.5 so what can you conclude?
horsegal244
  • horsegal244
soit is not likely
Michele_Laino
  • Michele_Laino
we can see that experimental probability is less than the relative frequency
horsegal244
  • horsegal244
ok Next one ill start a new page...
Michele_Laino
  • Michele_Laino
ok!

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