Solution

At most two persons are lighter than F. J is lighter than F. There will be two cases: _____ > _____ > _____ > _____> F > J  > _____ ……(i) _____ > _____ > _____ > _____> F > ____  > J …….(ii) D is heavier than I, which is heavier than G. G is heavier than F but lighter than H. G is not the third lightest person. E is neither the lightest person nor just lighter than G. The weight of H is 62kg. The weight of the second heaviest person is 78 kg. _____ > 78 > H > G > F > J  > _____ ……(i) D > I (78) > H (62) > G > F > E  > J …….(ii) The final arrangement is as follows: D > I (78) > H (62) > G > F > E  > J