The number of all possible matrices of order 2 × 3 with entries -1 or 1 is
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 64
Each entry can be either $-1$ or $1$.
Total entries in a $2\times 3$ matrix = $6$.
Each entry has 2 choices ⇒ total matrices = $2^{6}$.
$2^{6}=64$
The number of such matrices is $64$.