##### relational algebra

Consider a selection of the form σA≤100(r)σA≤100(r), where rr is a relation with 1000 tuples. Assume that the attribute values for A among the tuples are uniformly distributed in the interval [0, 500]. Which one of the following options is the best estimate of the number of tuples returned by the given selection query ?

- 50
- 100
- 150
- 200

This question has got more emphasis on keyword "uniformly distributed"

then it means that [0,500] occurs twice to make it 1000 tuples.

So, for σA≤100(r), we have got 200 tuples.

ma'am what the intiall line is stating im confused about that argument