2 probability Questions

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A researcher wants to get information from a focus group. How many focus group of 8 people can be selected?

If a focus group of 8 people is selected, what is the probability that all member of the group support living together before marriage? 

Jun 9th, 2015

We should know how many people are involved in this research. Let's call it n, the answer will be nC8 

Then if p is the proba that a member support living together before marriage the answer is p^8 


Jun 9th, 2015
Jun 9th, 2015

Thank you


I made the first one and it was 20c8= 125970

but I couldn't do the next 


Jun 9th, 2015

Thank you

I made the first one and it was 20c8= 125970

but I couldn't do the next 


Jun 9th, 2015

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Jun 9th, 2015
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Jun 9th, 2015
Sep 24th, 2017
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