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Matrices — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsMatrices1 Mark
MCQ
The restriction on $n, k$ and $p$ so that $PY + WY$ will be defined are:
  • ✓
    $k = 3, p = n$
  • B
    $k$ is arbitary$, p = 2$
  • C
    $p$ is arbitary$, k = 3$
  • D
    $k = 2, p = 3$
✓

Answer

Correct option: A.
$k = 3, p = n$
In this, order of $P = p \times k$ Order of $W = n \times 3$ Order of $Y = 3 \times k$
Thus, order of $PY = p \times k,$ when $k = 3$
And the order of $WY = p \times k,$ where $p = n$

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