How many persons are heavier than R ........

Directions (): Study the following information carefully and answer the questions given below.
Nine persons K, L, M, N, O, P, Q, R, S are going to gym on three dates 8, 17, 25 of three different month January, March and April of same year. Also each of them is of different weight. Only three persons are heavier than S. Q is going to gym immediately after N but not in the same month as N. Only one person go to gym in between O and R and all go in the same month. K is just heavier than M but lighter than Q. L is heavier than S but lighter than N who is not the heaviest. Only three persons go to gym in between L and S but none of them go to gym in a month having 30 days. The one who go immediately after O is not lighter than O. The one who is the lightest person attend gym immediately after L. As many persons go to gym in between N and K as between K and R. P is lighter than both M and O. R is not lighter than K. The one who go to the gym last is heavier than O but lighter than S.

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