Question

If $A$ is a proper subset of $B$, then $n\left(A\right)$$n\left(B\right)$.

• A. $<$
• B. $>$
• C. $=$

Answer 1

The correct option is A $<$

If $A$ is an arbitrary subset of $B$, then $n\left(A\right)\le n\left(B\right)$.
But when $A$ is a proper subset of $B$, the number of elements in $A$ is strictly less than that in $B$
i.e.$n\left(A\right)<n\left(B\right)$