In a group of 140 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?	Answers: A) 0.35 B) 0.55 C) 0.65 D) 0.75 E) 0.85
Number of people whose age is less than 20 is given by   140 - 90= 
<gadget id="calculator">140 - 90</gadget>
<output>50</output>
50   Probability P that a person selected at random from the group is less than 20 is given by   50 / 140= 0.35   correct answer 0.35
<result>A</result>
In a group of 140 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?