There are 100 women in a group. We know that

1) exactly 70 of them wear glasses,
2) exactly 75 of them have blonde hair,
3) exactly 80 of them are married,
4) exactly 85 of them are under 40.

If a woman in this group is under 40, wears glasses, has blonde hair and married, then she called a special woman. Find the minimum number of special women!