Q. If two sets $A$ and $B$ are having 99 elements in common, then the number of elements common to each of the sets $A \times B$ and $B \times A$ are
A) $2^{99}$
B) $99^{2}$
C) 100
D) 18
Explanation
(b)
Number of elements common to each set is $99 \times 99 = 99^{2}$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.