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In a group of 120 people, 90 have an age of more 30 years, and the others have an age of fewer 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?

 Nov 15, 2018
 #1
avatar+105277 
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P(< 20)  = [ 120 - 90 ] / 120    =   30 / 120    =   1 / 4

 

 

cool cool cool

 Nov 15, 2018
 #2
avatar+231 
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Thanks, CPhill.

 Nov 16, 2018

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