At a coffee shop, the first 100 customers' orders were as follows.

\begin{tabular}{|c|c|c|c|c|}
\hline
& Small & Medium & Large & Total \\
\hline
Hot & 5 & 48 & 22 & 75 \\
\hline
Cold & 8 & 12 & 5 & 25 \\
\hline
Total & 13 & 60 & 27 & 100 \\
\hline
\end{tabular}

Find the probability a customer ordered a large, given that they ordered a hot drink. Round to the nearest hundredth.



Answer :

To solve the problem of finding the probability that a customer ordered a large drink given that they ordered a hot drink, we need to use the concept of conditional probability.

Conditional probability is given by the formula:

[tex]\[ P(A \mid B) = \frac{P(A \cap B)}{P(B)} \][/tex]

where:
- \(P(A \mid B)\) is the probability of event \(A\) occurring given that \(B\) has occurred.
- \(P(A \cap B)\) is the probability of both events \(A\) and \(B\) occurring.
- \(P(B)\) is the probability of event \(B\) occurring.

In this particular problem:
- Event \(A\) is the event that a customer orders a large drink.
- Event \(B\) is the event that a customer orders a hot drink.

From the given data:
- The number of customers who ordered large hot drinks (\(A \cap B\)) is 22.
- The total number of customers who ordered hot drinks (\(B\)) is 75.

Thus, the conditional probability \(P(\text{Large} \mid \text{Hot})\) can be calculated as follows:

[tex]\[ P(\text{Large} \mid \text{Hot}) = \frac{22}{75} \][/tex]

To find this probability, divide 22 by 75:

[tex]\[ \frac{22}{75} \approx 0.29333333333333333 \][/tex]

We are asked to round this probability to the nearest hundredth. Therefore, 0.29333333333333333 rounded to the nearest hundredth is 0.29.

Thus, the probability that a customer ordered a large drink given that they ordered a hot drink, rounded to the nearest hundredth, is:

[tex]\[ \boxed{0.29} \][/tex]