Gareth selected a tile randomly from the set shown below. What is the probability that he selected a yellow tile or a tile with an odd number? Red tiles: 1, 2, 1, 3, 2, 3, 2, 4, 3, 1. Grey tiles: 2, 3, 1, 2, 3, 4, 1, 4, 1, 2. Blue tiles: 3, 2, 1, 3.
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