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March 3, 2015

March 3, 2015

Posted by **Mike** on Saturday, March 12, 2011 at 1:29pm.

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?

0.6242

0.3758

0.8926

0.2684

0.1074

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

3.5

8.0

1.6

2.0

5.0

- Statistics- Help -
**MathGuru**, Wednesday, March 16, 2011 at 9:09pmYou need to find P(0). Use a binomial probability table, with x = 0, n = 10, and p = .2. Subtract the value you find in the table from 1. This will be your probability.

Second part: take n * p, where n = 10, and p = .2.

I hope this will help.

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