Cardinal number of the set A = { x: x is neither prime nor composite number} is ____.
Infinite
0 (Zero)
1
2
1 is the only number which is neither prime nor composite.
A = {1}
n(A) = 1
Cardinal number of the set A = { x: x is prime number and x < 9} is ____.
Cardinal number of the set A = { x: x is even prime number} is ____.
The cardinal number of the set A = {Present Prime minister of India} is