How many black presidents has the United States had?
1
2
2
2
2
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
4
1
3
2
4
1
3
2
4
1
3
2
4
1
3
2
4
1
3
2
4
1
3
2
5
4
1
3
2
5
4
1
3
2
5
4
1
3
5
4
1
3
5
4
1
3
5
4
1
0
3
5
4
1
3
0
5
4
3
0
5
4
3
5
4
0
3
5
4
3
0
5
4
3
0
5
4
7
3
5
4
0
7
3
9
5
6
7
0
9
5
6
7
9
0
5
6
7
9
5
6
7
9
5
6
7
13
9
5
6
7
13
9
8
6
7
13
9
8
6
7
13
9
8
6
7
13
9
8
6
7
13
9
8
11
6
7
13
9
8
11
6
7
13
9
8
12
11
6
7
13
9
8
12
11
6
7
14
13
9
8
12
11
10
6
7
14
13
9
8
12
11
10
6
7
14
13
9
8
12
11