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Byju's Answer
If A=a,b,c:a,...
Question
If
A
=
{
(
a
,
b
,
c
)
:
a
,
b
,
c
are prime numbers and
a
+
b
+
c
=
9
}
, then the number of ordered triplets is
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Solution
Here,
a
,
b
,
c
are prime numbers and
a
+
b
+
c
=
9
⇒
a
=
2
,
b
=
2
,
c
=
5
;
a
=
2
,
b
=
5
,
c
=
2
;
a
=
5
,
b
=
2
,
c
=
2
;
a
=
3
,
b
=
3
,
c
=
3
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:
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, then the number of ordered triplets is
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