TS EAMCET · Maths · Probability
The probability distribution of a random variable \(X\) is given below
The variance of \(X\) is
- A 1.6
- B 0.24
- C 0.84
- D 0.75
Answer & Solution
Correct Answer
(C) 0.84
Step-by-step Solution
Detailed explanation
\( \text { We have, } \) \( \text { Variance } \begin{aligned} \left(\sigma^2\right) & =\Sigma P_i X_i^2-\left(\Sigma P_i X_i\right)^2 \\ & =3.4-(1.6)^2=3.4-2.56=0.84 \end{aligned} \)
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