Answer :
Step-by-step explanation:
x={m,n,q,r}
Since, the set x contains 4 elements
Therefore,
n(x)=4
Again,
y={q,r,a,b}
Since, the set y contains 4 elements
Therefore,
n(y)=4
Step-by-step explanation:
x={m,n,q,r}
Since, the set x contains 4 elements
Therefore,
n(x)=4
Again,
y={q,r,a,b}
Since, the set y contains 4 elements
Therefore,
n(y)=4