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You are a staff in the HUman Resource department. From the record, you know 80% if the applications for the financial position are rejected. And 20% will be accepted. 

 

 

1. What is the probabilty that among the 5 applications, none will be accepted ? 

 

 

I tried and found : that only 2 will be accepted ?? 

 

Thank you so much for you help ! 

 
 Feb 26, 2016
 #1
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Since 20% of 5 is 1, 1 will be accepted. And since 80% of 5 is 4, there is a 60% chance that none will be accepted.

 Feb 26, 2016
 #2
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P [none accepted]  =  (.80)^5   =  about .328  = about 32.8%

 

P [ 2 accepted]   =   5C2 * (.20)^2 (.80)^3 = about  .2048  = about 20.48%

 

 

cool  cool cool

 Feb 26, 2016
 #3
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CPhill: You may have misread the question??!!.

 Feb 26, 2016

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