How many students have interview between Q and N?

Explanation

The one who likes Sunflower, have interview on Thursday. R likes Jasmine and have interview on Tuesday. The one who likes Lotus, have interview on Monday. There are three days gap between R and M. There is one day gap between the days on which the ones who like Sunflower and Tulip have interview. The one who likes Marigold, have interview after the one who likes Tulip. The one who likes Lily, have interview after the one who likes Rose. S likes Lily. Q has interview immediate before O, so from this we can fix Q and O’s position. P has interview before N, so P has interview on Monday and N has interview on Saturday and we get the final arrangement: