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September 2, 2014

Homework Help: Need someone to check

Posted by Anonymous on Wednesday, February 9, 2011 at 7:35am.

It is known that about 20% of car insurance policies include emergency road service. Suppose we randomly select 10 car insurance policies.
What is the probability that at least one policy will have emergency road service?
Answer

0.6242

0.3758

0.8926

0.2684

0.1074

What is the expected number of policies having emergency road service?
Answer

3.5

8.0

1.6

2.0

5.0

I couldn't figure out the second part. for the first one i got .3758

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