Mathematics - Properties of Triangles Question with Solution | TestHub

MathematicsProperties of TrianglesGeneralHard2 minPYQ_2009

MathematicsHardsingle choice

The random variable $X$ has the following probability distribution $x P (X = x) 0 k 1 3 k 2 5 k 3 2 k 4 k$ Then the value of $P (X \geq 2)$ is

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Answer:

Solution:

Since, $Σ P_{i} (X = x) = 1$ $∴ k + 3 k + 5 k + 2 k + k = 1 ∴ 12 k = 1 ∴ k = \frac{1}{12} Now, P (X \geq 2) = P (X = 2) + P (X = 3) + P (X = 4) = 5 k + 2 k + k = 8 k = 8 (\frac{1}{12}) = \frac{2}{3}$

Stream:BITSATSubject:MathematicsTopic:Properties of TrianglesSubtopic:General

⏱ 2mℹ️ Source: PYQ_2009

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