1. A coin is thrown 3 times. What is the probability that at least one head is obtained? A. 5+6 B. 7÷8 C. 5+7 D. 1+8 2. There are 5 green 7 red balls. Two balls are selected one by one without replacement. Find the probability that first is green and second is red. A. 35+132 B. 30+132 C. 30+144 D. 35+144

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