The probability of drawing a red marble is 5/14.
Probability calculates the chances that an event would occur. The chances of the event occurring lies between 0 and 1. It is zero if the event does not occur and 1 if the event occurs.
The probability of drawing a red marble = number of times the red marble was drawn / total number of marbles
20 / (20 + 24 + 12)
= 20 / 56 = 5/14
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