A store sells 3 models of a TV. It sells 20% of model A, 30% of model B, and 50% of model C. 50% of model A, 70% of model B and 90% of model C are "HD". If a TV is selected randomly, find probability that it's "not HD".
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- Model A: 20% - Model B: 30% - Model C: 50% Show more…
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