Four people are talking about Lao Tian's deposit. A said, Lao Tian has a deposit of at least 5,000 yuan. B said, No, there is at least ten thousand yuan. C said, his savings is less than twenty thousand. Ding said, there is at least one hundred yuan in Lao Tian's passbook. In fact, only one of them is right.
Lao Tian's deposit is less than 100 yuan can be derived from this.