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6.3 The daily amount of coffee, in liters, dispensed by a machine located in an airport lobby is a random variable X having a continuous uniform distribution with A = 7 and B = 10. Find the probability that on a given day the amount of coffee dispensed by this machine will be (a) at most 8.8 liters;

Question

6.3 The daily amount of coffee, in liters, dispensed by a machine located in an airport lobby is a random variable X having a continuous uniform distribution with A = 7 and B = 10. Find the probability that on a given day the amount of coffee dispensed by this machine will be (a) at most 8.8 liters;

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Solution

The problem is asking for the probability that the amount of coffee dispensed is at most 8.8 liters. Given that the distribution is uniform, the probability density function (pdf) is 1/(B-A) for A ≤ x ≤ B.

Step 1: Identify the parameters of the distribution. Here, A = 7 and B = 10.

Step 2: Calculate the pdf. The pdf is 1/(B-A) = 1/(10-7) = 1/3.

Step 3: Calculate the probability. The probability that the amount of coffee dispensed is at most 8.8 liters is the integral from A to 8.8 of the pdf.

Since the pdf is constant (1/3), this integral is simply (8.8 - A) * pdf = (8.8 - 7) * (1/3) = 0.6.

So, the probability that on a given day the amount of coffee dispensed by this machine will be at most 8.8 liters is 0.6 or 60%.

This problem has been solved

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