Mathematics, 15.01.2020 23:31 idonthaveausername

In a group of 120 people 90 have an age of more than 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 persons age is less than 30

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In a group of 120 people 90 have an age of more than 30 years and the others have an age of less tha...

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