+0  
 
+1
110
2
avatar+273 

I need all three please

LaughingFace  Apr 16, 2018
 #1
avatar+89714 
+2

First one

 

P (L or D)  = P(L)  + P(D)  - P(L and D)  =

                    (18/50)  + (20/50)  - (6/50)  =

                      [ 18 + 20 - 6 ] / 50  =

                         32/50  =   16/25   =    64%

 

Second one

 

P ( A or B )  = P (A)  + P (B)  - P (A and B)  =

                        .40    +  .25    - .16  =

                                 .49

 

Last one

 

P (S  or R)  = P(S)  + P(R)  - P(S and R )

 

65/200   =   P(S)  +  5/200 - 30/200

 

65/100 = P(S)  - 25/200         add 65/200 to both sides

 

90 /200  = P (S)     =  9/20

 

 

cool cool cool

CPhill  Apr 16, 2018
 #2
avatar+273 
+2

Thank you so extremely much! 

LaughingFace  Apr 16, 2018

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