Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Home (1st leg) | Home (2nd leg) | 1st Leg | 2nd leg | Aggregate |
| --- | --- | --- | --- | --- |
| Independiente | Ramón Santamarina | 3-1 | 3-2 | 6-3 |
| Talleres | Estudiantes La Plata | 1-1 | 1-3 | 2-4 |
| Newell's Old Boys | Chacarita Juniors | 0-0 | 2-1 | 2-1 |
| San Lorenzo | Argentinos Juniors | 2-2 | 0-1 | 2-3 |
| San Martín | Estudiantes RC | 4-2 | 0-0 | 4-2 |
| Boca Juniors | Vélez Sársfield | 3-2 | 0-3 | 3-4 |
| Ferro Carril Oeste | Unión | 1-0 | 2-1 | 3-1 |
Question:
How many 2nd legs had an aggregate of 2-4?
Answer:
1.0