To find the probability of randomly selecting a "solid" marble, we need to calculate the total number of solid marbles and divide it by the total number of marbles.
Total number of solid marbles = 8 (Red) + 6 (Green) + 12 (Blue) = 26
Total number of marbles = 60 (Red) + 18 (Green) + 29 (Blue) = 107
P(Solid) = Total number of solid marbles / Total number of marbles
P(Solid) = 26 / 107
Therefore, the probability of randomly selecting a "solid" marble from this list is 26/107.
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