Final answer:
The probability of picking a non-green ball without looking is 9/20 + 6/20 = 15/20 = 3/4.
Step-by-step explanation:
The total number of balls in the bag is 5 + 9 + 6 = 20.
The probability of picking a non-green ball without looking is equal to the probability of picking either a red or a blue ball.
The probability of picking a red ball is 9/20 and the probability of picking a blue ball is 6/20.
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