Each of the 110 residents in Dashville is either a rancher

Each of the 110 residents in Dashville is either a rancher or an tractor-driver, but not both. How many residents of Dashville are ranchers?

(1) There are more than 81 ranchers who reside in Dashville

(2) The number of ranchers who reside in Dashville is less than three times the number of tractor-drivers who reside in Dashville

How to solve it using Double Matrix method ?