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In a class of 28 students, the teacher selects four people at random to participate in a geography contest. What is the probability that this group of four students includes at least one of the top three geography students in the class? Express your answer as a common fraction.

 Apr 1, 2021
 #1
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Probability   = 1  -  minus  the probability  that  none  of the  top three geography students are  chosen  =

 

1  -  ( 25/28) (24/27) (23 / 26) (22/25)  =   

 

313 / 819

 

cool cool cool

 Apr 1, 2021

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