Question

If a and b are disjoint sets,then how can u find n(aub)

Answer 1

a and b disjoint set(non-overlapping)sets...
So a intersection b=phy
n(a u b)=no of no's in the set..
Example....A={2,3},B={4,6}(disjoint cell)
A U B={2,3,4,6}
So..n(A U B)=4...(4 nos inside the curly brace...
Here...you go...if any doubt ...comment below...