Jenny and Carol are John#%92s aunts. John#%92s house is in the middle of aunts houses. Jenny ----------John----------Carol The red bus runs each 10 minutes from John house to Carol house. The blue bus runs each 10 minutes from John house to Jenny house. Both buses runs in different times. To be fare with hers, John decided to live his house at random time and take the first bus. After 2 week one of the aunts complains to John, because he visits more frequently to the other aunt. Why? Luis Martin Moderator SQL-Server-Performance.com All in Love is Fair Stevie Wonder All postings are provided â€œAS ISâ€ with no warranties for accuracy.