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There are 7 Code-A-Pillar command blocks; 3 left, 2 straight, 1 right, and 1 sound. 3 blocks were chosen at random for the Code-A-Pillar. What

There are 7 Code-A-Pillar command blocks; 3 left, 2 straight, 1 right, and 1 sound. 3 blocks were chosen at random for the Code-A-Pillar. What is the probability that the 2 straights were chosen for either end, and the sound for the middle? Use permutations and/or factorials Show all work

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