How do deliverable and non deliverable traded stocks tally?

When you look at the nse website they provide the security wise delivery position for everyday. In that how do deliverable quantity and the others tally? Lets say the deliverable % is 30 that means 70 is squared off the same day isn't?to whom did the intraday people sell the stocks?they can't sell it among themselves
as the position would still be open with some one if they do that...thanks for any inputs

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