A spa owner classifies customers as well dressed, moderately dressed or poorly dressed, and find 50%, 40%, 10% respectively of all customers fall into these categories. The owner found that a full spa treatment was selected by 70% of well dressed, by 50% of the moderately dressed and by 30% of the poorly dressed customers. What is the probability that a randomly selected customer will select a full spa treatment. Select one: a. 0.580 b. 0.345 c. 0.625 d. 0.667

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