The probability of a point to be in the given segment is :
For the whole segment, NT, there are 11 points.
Segment NX has 5 points, so the probability of a point being in the segment is :
Segment RU has 3 points, the probability of a point being in the segment RU is :
Segment HF has 8 points, the probability of a point being in the segment HF is :