The number of all possible matrices of order 2 × 2 with each entry 'a', 'b' or 'c' is:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 81
No. of entries possible = 3
No. of cells = $2×2=4$
So total no. of matrices
= combination of all cells = $3^4=81$