How many U.S. states have a population of at least 20 million?
4
5
3
2
5
3
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
2
5
3
1
4
6
2
5
3
1
4
6
7
2
5
3
1
4
6
7
2
5
3
1
4
6
7
2
5
3
1
4
6
7
2
5
3
1
4
6
7
2
5
3
1
8
4
6
9
7
2
5
3
1
8
4
6
9
7
2
5
3
1
8
4
6
9
10
7
2
5
11
3
1
8
4
6
9
10
7
2
5
11
12
3
1
8
4
6
13
9
10
7
2
5
11
12
3
1
8
4
6
13
9
10
7
2
11
12
1
8
4
6
13
9
10
7
11
12
1
8
6
13
9
10
7
11
12
8
6
13
9
10
7
11
12
8
6
13
9
10
7
11
12
8
6
13
9
10
7
11
12
14
8
6
13
9
128
2 states
128
5 states
7 states
4 states
128