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A fast-food restaurant gives a coupon for a free drink to customers who wait in line more than 15 minutes. The dot plot shows the number of minutes 20 customers waited in line one Monday morning at the restaurant.What is the probability that a customer randomly selected from the 20 customers received a coupon for the free drink that Monday morning?

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GMAT Problem-solving questions consist of topics such as arithmetic, algebra, geometry, and more. 
Approximately 18 – 20 questions are there.


A fast-food restaurant gives a coupon for a free drink to customers who wait in line more than 15 minutes. The dot plot shows the number of minutes 20 customers waited in line one Monday morning at the restaurant.<br><img alt='Images' src='https://www.fatskills.com/images3/gmat/f0209-01.jpg'><br>What is the probability that a customer randomly selected from the 20 customers received a coupon for the free drink that Monday morning?






 
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