1. M likes Yellow colour and sits third from one of the extreme ends of the line. Only two persons sit between M and Jwho likes red colour. J does not sit at either of the extreme ends of the line.
Case 1:
Case 2:
2. The one who likes Blue and Pink colour is not an immediate neighbour of the one who likes Red colour . L likes blue colour and sit third to the right of O who likes Pink colour. O faces south. L does not sit at one of the extreme ends of the line.
This is possible only in case 1.
3. I sit at one of the extreme ends of the line. L sits second to the right of N and both face opposite direction. Thje immediate neighbours of L face the same direction as L.
4. I does not black colour. K does not like brown colour. N neither likes brown nor black.
Hence, number of persons face the north direction Cannot be determined