In a group of 100 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?  Choose the correct choice from the following choices:
A) 0.1  B) 0.55  C) 0.65  D) 0.75  E) 0.85
Number of people whose age is less than 20 is given by   100 - 90= 
<gadget id="calculator">100 - 90</gadget>
<output>10</output>
10   Probability P that a person selected at random from the group is less than 20 is given by   10 / 100= 
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>
0.1   correct answer 0.1
<result>A</result>
In a group of 100 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?