In Ashish’s opinion, his weight is greater than 55 kg but less than 62 kg. His father does notagree with Ashish and he thinks that Ashish’s weight is greater than 50 kg but less than 60 kg. His sister’s view is that his weight can't be greater than 58 kg. If all of them are correct in their estimation, what is the average of different probable weights of Ashish ?