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Mathematics
The Cartesian product of two sets P and Q, i.e., P × Q =φ, if
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Q. The Cartesian product of two sets $P$ and $Q$, i.e., $P \times Q =\phi$, if
Relations and Functions
A
either $P$ or $Q$ is the null set
50%
B
neither $P$ nor $Q$ is the null set
13%
C
Both (a) and (b)
31%
D
None of the above
6%
Solution:
If either $P$ or $Q$ is the null set, then $P \times Q$ will be an empty set, i.e. $P \times Q =\phi$