The probability that a customer ordered a large given that he or she ordered a cold drink is 20%
How to determine the probability?
The probability is represented as:
P(Ordered large | Cold drink)
It is calculated using:
P(Ordered large | Cold drink) = n(Ordered large and Cold drink) / n(Cold drink)
Using the values in the table, we have:
P(Ordered large | Cold drink) = 5/(8 + 12 + 5)
Evaluate
P(Ordered large | Cold drink) = 0.2
Express as percentage
P(Ordered large | Cold drink) = 20%
Hence, the probability that a customer ordered a large given that he or she ordered a cold drink is 20%
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