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The graph shows a probability distribution.       

What is P(2.5 ≤ X ≤ 4)?

 

The weights X of a person are distributed according to the probability distribution shown.

What is the probability that the person's weight will be less than 180 pounds?

0.25

0.40

0.60

0.75

 Mar 12, 2018
 #1
avatar+101746 
+2

First one

 

P ( 2.5   ≤ x   ≤ 4 )  =

 

Width of the interval of interest

_________________________     =

    Total width of interval

 

(4 - 2.5)                   1.5

______     =        ________    =   .375

  4 - 0                       4

 

 

Second one

P( < 180)  =

 

180 - 177                  3

_________  =         ___    =   .60

182  - 177                 5

 

 

 

cool cool cool

 Mar 12, 2018

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