In a group of 120 people, 90 have an age of more 30 years, and the others have an age of less than 20 years. If a person is selected at random from this group, what is the probability the person's age is less than 20?	Pick
A) 60 / 120	B) 15 / 120	C) 30 / 120	D) 80 / 120	E) 40 / 120

Rationale: "number of people whose age is less than 20 is given by 120 - 90 = 30 probability p that a person selected at random from the group is less than 20 is gieven by 30 / 120 = 0.25 correct answer c"
Answer: C