The weight of a man is 63 kg 450 g. What is his weight in kg?
In Vignesh's opinion, his weight is greater than 65 kg but less than 77 kg. His brother does not agree with Vignesh and he thinks that Vignesh's weight is greater than 63 kg but less than 72 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Vignesh?