In a group of 120 people, 90 have an age of more than 30yrs and the ot – InterviewSolution

1.	In a group of 120 people, 90 have an age of more than 30yrs and the other have an age of less than 20yrs . If a person is selected at random from this group,what is the probability that person's age is less than 20yrs. Please help with the steps
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