Question

Given $A=\{5,6,7\}$ and $B=\{6,8,10\}$, then find the no. of elements in $B\cap A$.

Answer 1

Given : $A=\{5,6,7\}$ and $B=\{6,8,10\}$

We know that intersection of two sets contains the elements common in both the sets.
Thus, $B\cap A=\left\{6\right\}$

Hence, no. of elements in $B\cap A$ is $1$.