How many presidents have been black?
1
2
2
2
2
2
2
1
2
1
2
1
2
1
2
1
4
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
3
1
4
5
3
1
4
5
3
1
4
5
0
3
1
4
5
3
0
1
7
4
5
3
0
7
4
5
3
7
4
5
0
3
7
4
5
6
3
0
7
4
5
6
3
0
7
5
6
7
5
0
6
7
5
6
7
5
8
9
6
7
5
8
9
6
7
5
8
9
6
13
7
5
8
9
6
13
7
8
9
6
13
7
8
9
6
13
7
8
9
6
13
7
8
9
6
13
7
8
9
6
13
7
8
9
6
11
13
7
12
8
9
6
11
13
7
Two
12
8
9
6
11
13
Two
12
8
9
6
10
11
13
Two
12
One
8
9
6
10
11