The table given below shows the number of students passed in examination in five different schools for three different years.
| School | Years | ||
| Y1 | Y2 | Y3 | |
| S1 | 200 | 700 | 600 |
| S2 | 300 | 800 | 900 |
| S3 | 400 | 320 | 200 |
| S4 | 550 | 400 | 650 |
| S5 | 600 | 500 | 720 |
J1 = The average number of passed student in school S1 in all three years
J2 = The difference between the total number of passed student in all years together in school S2 and S3
What is the value of (J2 - J1)?
1
500
2
620
3
550
4
580