Abag contains 50 marbles, 10 of which are blue, 8 are red, 20 are green, and 12 are purple. marcie takes a marble out of the bag, records the color, and returns it to the bag. how many red marbles should she expect after 500 trials? (5 points)
80
100
120
200
i got 80.

50 total marbles

chance of getting a red marble is 8/50

8/50 = 80/500

Answer is 80

You need to work out what fraction of the 50 are red 8\50 are red
Find out how many times 50 goes in 500                                                                  500 divided by 50 = 10                                                                                                 Multiply by 8 to get the total number of red
8x10 = 80 red marbles

The answers are 20,30,80,180,960,890,1230,4560. on the first row