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An animal is randomly selected from this table. What is the probability that it is a male, given that it is cattle?

\begin{tabular}{|c|c|c|c|c|}
\hline
\multicolumn{5}{|c|}{Animals on a Farm} \\
\hline
& Cattle & Sheep & Chicken & Pig \\
\hline
Male & 1 & 3 & 2 & 5 \\
\hline
Female & 5 & 2 & 13 & 3 \\
\hline
\end{tabular}

[tex]\[ P(\text{Male} \mid \text{Cattle}) = \underline{[?]} \][/tex]


Sagot :

To determine the probability that an animal is male given that it is cattle, we need to follow these steps:

1. Identify the numbers of male and female cattle from the table:
- Male Cattle: 1
- Female Cattle: 5

2. Calculate the total number of cattle:
To find the total number of cattle, we sum the number of male and female cattle.
[tex]\[ \text{Total Cattle} = \text{Male Cattle} + \text{Female Cattle} = 1 + 5 = 6 \][/tex]

3. Calculate the probability that an animal is male given that it is cattle:
The probability of an event [tex]\( A \)[/tex] given [tex]\( B \)[/tex] is defined as:
[tex]\[ P(A|B) = \frac{P(A \cap B)}{P(B)} \][/tex]
In our specific example, [tex]\( A \)[/tex] is the event that the animal is male, and [tex]\( B \)[/tex] is the event that the animal is cattle. The intersection of these events [tex]\( A \cap B \)[/tex] is simply the event that the animal is a male cattle.

Therefore, the probability that an animal is male given that it is cattle is calculated as follows:
[tex]\[ P(\text{Male}|\text{Cattle}) = \frac{\text{Number of Male Cattle}}{\text{Total Number of Cattle}} = \frac{1}{6} \][/tex]

Hence, the probability that an animal is male given that it is cattle, [tex]\( P(\text{Male}|\text{Cattle}) \)[/tex], is:
[tex]\[ \boxed{0.16666666666666666} \approx 0.167 \][/tex]