Question:medium

Let \( P = \begin{bmatrix} 1 & 2 & 3 \\4 & 5 & 6 \\ 7 & 8 & 9 \end{bmatrix} \) be a matrix. Three elements of this matrix P are selected at random. A is the event of having the three elements whose sum is odd. B is the event of selecting the three elements which are in a row or column. Then \( P(A) + P(A|B) = \)

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For small sample spaces, listing outcomes is faster.

Updated On: Mar 26, 2026

221/420
17/21
21/20
3/2

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The Correct Option is B

Solution and Explanation

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