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Statistics - Probability

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. A professional chef's work responsibilities include creating new dishes, shopping for ingredients and cooking the meals. On Friday, Justin, a professional chef, spent 2 hours shopping for ingredients, 3 hours creating new dishes and 5 hours cooking the meals. If Justin's work hours on Saturday are spent approximately the same way they were on Friday, what are the chances that at any given moment on Saturday Justin will be creating new dishes or cooking the meals? Show step by step work! Give answer as a fraction in lowest terms.

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