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https://vle.mathswatch.co.uk/images/questions/question1249.png

 

Can someone please help me with part B of this question? 

Thank you!

 May 3, 2020
 #1
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The probability  =

 

1 -  the probability that Colin is not chosen at all  =

 

1 - P(that Colin isn't chosen the first time) *P(that Colin isn't chosen the second time)  =

 

1 - (9/10)(8/10)  =

 

1 -  72/100  =

 

1 - .72  =

 

.28

 

 

cool cool cool

 May 3, 2020

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