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Mathematics
Problem
Let
A
=
{
0
,
1
,
2
,
3
,
4
}
A=\{0,1,2,3,4\}
A
=
{
0
,
1
,
2
,
3
,
4
}
and
B
=
{
1
,
2
,
3
,
4
}
B=\{1,2,3,4\}
B
=
{
1
,
2
,
3
,
4
}
. Determine the number of ordered pairs
(
a
,
b
)
(a,b)
(
a
,
b
)
such that
a
+
b
=
4
a+b=4
a
+
b
=
4
. a)
5
5
5
b)
4
4
4
c)
3
3
3
d)
6
6
6
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