Question

Cardinal number of the set A = { x: x is even prime number} is ____.

• A. Infinite
• B. 0 (Zero)
• C. 1
• D. 2

Answer 1

The correct option is C

1

2 is the only even prime number

$\Rightarrow A=\left\{2\right\}$

$\Rightarrow n\left(A\right)=1$