Range = Maximum value - Minimum value It is given that range =65 Clearly, B is either maximum value or minimum value. If B is maximum value, then ⇒65=B−20 ⇒B=85 If B is minimum value, then ⇒65=70−B ⇒B=5 ⇒ Absolute difference of Absolute difference of possible values of B=|85−5|=80