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The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Solve this problem! extra ! 3025/5.5 = a/90.75

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.