Very simple "which ever team plays better will win matches"
Today LANKA will beat B'desh and will enter super 8
Next INDIA will beat Sri lanka to enter Super 8. If INdia loses to Lanka then they have to wait match between Bermuda AND B'desh , B'desh likely to win against Bermuda. But in game of cricket we can't say anything can happen. INDIA have to wait till 23rd for their entry in to super 8