Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let R be a relation defined on the set 
by 
. Then the number of elements in R is
Text Solution
Verified by ExpertsThe correct answer is:
D
We need 
where 
.
Possible values of 
: range from 5 to 20 .
Possible values of 
: range from 7 to 28 .
For each common value 
, the number of elements in 
equals (number of 
with 
) × (number of 
with 
).
Total 
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