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anonymous
 one year ago
WILL MEDAL AND FAN
(06.02)A bag contains 30 marbles, 3 of which are blue, 20 are red, 5 are green, and 2 are purple. Emerson takes a marble out of the bag, records the color, and returns it to the bag. How many purple marbles should he expect after 300 trials?
20
30
50
200
anonymous
 one year ago
WILL MEDAL AND FAN (06.02)A bag contains 30 marbles, 3 of which are blue, 20 are red, 5 are green, and 2 are purple. Emerson takes a marble out of the bag, records the color, and returns it to the bag. How many purple marbles should he expect after 300 trials? 20 30 50 200

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0On any draw, what is the probability of choosing a purple marble?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0idk, but i think it is 20

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How many purple marbles are there?

kropot72
 one year ago
Best ResponseYou've already chosen the best response.1The probability of drawing a purple marble is 2/30 on each trial. The expected number of purple marbles after 300 trials is therefore \[\large \frac{2}{30}\times\frac{300}{1}=?\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i think so because all of the marbles added up = 30, and 30 x 10 = 300
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