The task is to generate the correct answer for a given math problem.
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Question: Problem: 20 is subtracted from 80 % of a number , the result is 60 . find the number ?

Answer: 100

Question: Problem: there are 2 red chips and 3 blue ones . when arranged in a row , they form a certain color pattern , for example rbrrb . how many color patterns ?

Answer: e ) 10

Question: Problem: 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 ?

Answer:
0.1