Q182 / 270 · NDA 2021 (Phase 2) · Mathematics

How many distinct matrices exist with all four entries taken from $\{1,2\}$ ?

Correct answer
A
16
B
24
C
32
D
48

Solution

Number of matrices exist with all four entries taken from $(1,2)=2 \times 2 \times 2 \times 2=16$.

Hence, the correct answer is option: 'A'.

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