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I put 12 marbles in a bag some red, some pink, some blue, some green. The probability of picking a pink marble is 1/2. Can the number of green marbles be 6? Explain
What is no? If the probability of pink is 1/2 there are 6 pink marbles. There can't also be 6 green marbles or there wouldn't be red and blue marbles in the bag. 6 + 6 is 12. There are only 12 marbles in the bag.