Answer:
12 out of 32
Step-by-step explanation:
12 of the marbles aren't red and there are a total of 32 marbles when you add them up.
probability=number of favorable cases/number of possible cases
the number of favorable cases is obtain by adding the number of green marbles with the number of yellow marbles
number of favorable cases : 4+8=12
number of possible casses is the sum of all marbles: 4+8+20=32
probability=12/32= 3/8
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