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Byju's Answer
Standard XII
Mathematics
Number of Elements in a Cartesian Product
If the sum of...
Question
If the sum of two coprime numbers
x
,
y
(
x
<
y
)
is
20
,
then the total possible number of ordered pair(s)
(
x
,
y
)
is
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Solution
x
+
y
=
20
Possible pairs with
x
<
y
are
(
1
,
19
)
,
(
3
,
17
)
,
(
7
,
13
)
,
(
9
,
11
)
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