+0  
 
+2
201
2
avatar+369 

https://vle.mathswatch.co.uk/images/questions/question2746.png

 

smileysmileysmiley

qualitystreet  Feb 13, 2018
 #1
avatar+89775 
+1

Probability that she walks  = 0.65

Probability that she cycles  = 0.35

Probability that  she is not late when she walks  = ( 1 - 0.4)  =  0.6

Probability  that she is not late when she cycles  = ( 1 - 0.1)  = 0.9

 

Probability that she is not late  =

 

(.65) (.6)  + (.35)(.9)   =   .705  =  70.5%

 

 

cool cool cool

CPhill  Feb 13, 2018
 #2
avatar+369 
0

Thanks for helping.

 

smileysmileysmiley

qualitystreet  Feb 14, 2018

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