Noah has a bag of 30 marbles. Of these marbles 8 are blue, 9 are red, and the rest are clear. What is the probability that a marble taken from the bag will not be red?
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Total number of marbles is 30
Number of red marbles is 9.
The rest blue and clear marbles sum up to 21.
Therefore the probability of not picking a red marble is (number of possible outcomes)/ (total number of outcomes)= 21/30= 7/10 = 0.7
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