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? Options:  A) 0.1  B) 0.13  C) 0.2  D) 0.25  E) 0.3
Number of people whose age is less than 20 is given by   120 - 90= 
<gadget id="calculator">120 - 90</gadget>
<output>30</output>
30   Probability P that a person selected at random from the group is less than 20 is gieven by    30 / 120= 
<gadget id="calculator"> 30 / 120</gadget>
<output>1/4 = around 0.25</output>
0.25   correct answer 0.25
<result>D</result>
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?