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Mathematics
Mathematics
Problem
Take
A
=
{
1
,
2
,
3
,
4
}
A=\{1,2,3,4\}
A
=
{
1
,
2
,
3
,
4
}
and
B
=
{
2
,
3
,
4
,
5
}
B=\{2,3,4,5\}
B
=
{
2
,
3
,
4
,
5
}
. Determine how many ordered pairs
(
a
,
b
)
∈
A
×
B
(a,b)\in A\times B
(
a
,
b
)
∈
A
×
B
satisfy
a
+
b
=
6
a+b=6
a
+
b
=
6
.
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