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The graph shows a probability distribution.What is P(X<3)?

 

 

0.125

0.25

0.75

0.875

 

THANKS!!!

 May 21, 2019
 #1
avatar+103982 
+2

Note that if we draw a vertical line at x = 3.....we have a triangle on the right with a base of 1 and a height of .25

 

So....the area of this triangle  =  (1/2) (base) (height)  = (1/2) (1) (.25)  = .125

 

So....P ( X < 3)  =   Total area -  area of the triangle on the right  =  1 - .125  = .875

 

 

cool cool cool 

 May 21, 2019

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