Question

The set O represents the minimum temperatures, in degrees Fahrenheit, recorded in the city of Orlando in a year. . . O = {49, 50, 50, 55, 56, 60, 65, 65, 70, 71, 72, 72} . . The set T represents the minimum temperatures, in degrees Fahrenheit, recorded in the city of Tampa in a year. . . T = {52, 54, 55, 59, 59, 61, 62, 68, 68, 70, 74, 75} . . How many elements are in the set O ∪ T? A) 2. B) 5. C) 17. D) 25

Answer 1

The union - set of all elements in O and T ( or both ):
O  U T = { 49,50,52,54,55,56,59,60,61,62,65,68,70,71,72,74,75 } 
Number of elements in the set O U T is 17. Answer: C )