+0  
 
+1
120
1
avatar+589 

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

jbouyer  Mar 12, 2018
 #1
avatar+87301 
+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

CPhill  Mar 12, 2018

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