Probability of a number greater than 7, P(>7) = 3/10, Probability of an even number, P(even number) = 5/10 = 50%, Probability of an 8., P(8) = 1/10 = 10%, Probability of landing on a 4 or a 5, P(4 or 5) = 2/10=20%, Probability of orange or an odd number, P(orange or odd) = 6/10 = 60%, Probability of picking a green marble, replacing it, and then picking a red marble, 4/10 * 3/10 =  12%, The probability of picking a red marble, keeping it, and then green marble, 3/10 *4/9 = 12/90 = 4/30 = 13%, The probability of picking a red ball, replacing it, then picking a blue ball., 3/10 * 2/10 = 6/100 = 6%, The probability of picking a red ball, keeping it, then picking a blue ball., 3/10 * 2/9 = 2/30 = 1/15 = 6.7%.

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