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This table shows how many sophomores and juniors attended two school events. A student is selected randomly from this group.

\begin{tabular}{|c||c|c|c|}
\hline & \begin{tabular}{c}
Jazz band \\
concert
\end{tabular} & Volleyball game & Total \\
\hline Sophomore & 35 & 42 & 77 \\
\hline Junior & 36 & 24 & 60 \\
\hline Total & 71 & 66 & 137 \\
\hline
\end{tabular}

What is the probability that the student attended the jazz concert, given that the student is a junior?

Round your answer to two decimal places.

A. 0.51


Sagot :

To determine the probability that a student attended the jazz concert given that the student is a junior, we need to use the concept of conditional probability. The steps are as follows:

1. Identify the Total Number of Juniors:
From the table, we see that the total number of juniors is 60.

2. Identify the Number of Juniors Who Attended the Jazz Band Concert:
According to the table, 36 juniors attended the jazz band concert.

3. Calculate the Conditional Probability:
The conditional probability formula is:
[tex]\[ P(\text{Jazz Band Concert} | \text{Junior}) = \frac{\text{Number of Juniors Who Attended the Jazz Band Concert}}{\text{Total Number of Juniors}} \][/tex]
Plugging in the values, we get:
[tex]\[ P(\text{Jazz Band Concert} | \text{Junior}) = \frac{36}{60} \][/tex]

4. Simplify the Probability:
[tex]\[ \frac{36}{60} = 0.6 \][/tex]

5. Round the Result to Two Decimal Places:
Since [tex]\( 0.6 \)[/tex] is already in the desired format, the answer is:
[tex]\[ 0.6 \][/tex]

So, the probability that a student attended the jazz concert given that they are a junior is [tex]\( \boxed{0.6} \)[/tex].