Asked by Anonymous

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

14 years ago

Answered by Writeacher

Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.

14 years ago

Answered by drwls

How did you get 0.3748 for part 1? The correct answer is 1 - (0.8)^10

One minus the probability that none of the ten have roadside coverage

The expecation value is the single-policy probabiity x (number of policies). That product is 2.

14 years ago

There are no AI answers yet. The ability to request AI answers is coming soon!