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Mathematics
Problem
Let
A
=
{
1
,
2
,
3
,
4
,
5
,
6
}
A=\{1,2,3,4,5,6\}
A
=
{
1
,
2
,
3
,
4
,
5
,
6
}
and
B
=
{
1
,
2
,
3
,
4
,
5
,
6
,
7
,
8
}
B=\{1,2,3,4,5,6,7,8\}
B
=
{
1
,
2
,
3
,
4
,
5
,
6
,
7
,
8
}
. Find the number of ordered pairs
(
a
,
b
)
(a,b)
(
a
,
b
)
for which
a
≤
b
a\le b
a
≤
b
. a) 31 b) 33 c) 27 d) 30
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