The probability of drawing a black marble, when selecting randomly from two boxes containing different colored marbles, is 41/70.
Probability of Drawing a Black Marble:
For the first box: P(black) = 8/(6+8) = 8/14 = 4/7
For the second box: P(black) = 6/(4+6) = 6/10 = 3/5
So, the overall probability of drawing a black marble from either box is (4/7 + 3/5) / 2 = 41/70
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