4. Mode is 27.5 and Lower limit of the modal class is 20, f_{1} = 15 f_{0} = 12 f_{2} = 10 Find the upper limit of the modal class

Question

Mode is 27.5 and Lower limit of the modal class is 20, f_{1} = 15 f_{0} = 12 f_{2} = 10 Find the upper limit of the modal class.