NCERT Example 7 - Sets
Question: Which pair is equal? A = {0}, B = {x : x > 15 and x < 5}, C = {x : x - 5 = 0}, D = {x : x^2 = 25}, E = {x : x is an integral positive root of x^2 - 2x - 15 = 0}.
Answer: C = E = {5}.
Full step-by-step NCERT solution with diagrams on Something by Zero.