A random variable X has a probability distribution given by ( P(X) = egin{cases} 0.2 & text{if } $x = 1$ $text{if} (x = 1\ 0.3 & text{if} \(x = 2$ $text{if} (x = 2\ 0.5 & text{if} \(x = 3$ $text{if}\((x = 3$\ \end{cases} ). Find the mean and standard deviation of X.

Question

A random variable X has a probability distribution given by ( P(X) = egin{cases} 0.2 & text{if } $x = 1$ $text{if} (x = 1\ 0.3 & text{if} \(x = 2$ $text{if} (x = 2\ 0.5 & text{if} \(x = 3$ $text{if}\((x = 3$\ \end{cases} ). Find the mean and standard deviation of X.

Accepted Answer

$\text{Mean} = 2.1, \text{S\tandard Deviation} = 0.8$

Post Utme Uniosun 2025 Mathematics Question 12

A random variable X has a probability distribution given by ( P(X) = egin{cases} 0.2 & text{if } \(x = 1\) \\(text{if} (x = 1\ 0.3 & text{if} \(x = 2\) \\(text{if} (x = 2\ 0.5 & text{if} \(x = 3\) \\(text{if}\((x = 3\)\ \end{cases} ). Find the mean and standard deviation of X.

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Post Utme Uniosun 2025 Mathematics Question 12

A random variable X has a probability distribution given by ( P(X) = egin{cases} 0.2 & text{if } \(x = 1\) \\(text{if} (x = 1\ 0.3 & text{if} \(x = 2\) \\(text{if} (x = 2\ 0.5 & text{if} \(x = 3\) \\(text{if}\((x = 3\)\ \end{cases} ). Find the mean and standard deviation of X.

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A random variable X has a probability distribution given by ( P(X) = egin{cases} 0.2 & text{if } \(x = 1\) \\(text{if} (x = 1\ 0.3 & text{if} \(x = 2\) \\(text{if} (x = 2\ 0.5 & text{if} \(x = 3\) \\(text{if}\((x = 3\)\ \end{cases} ). Find the mean and standard deviation of X.