Posted by **Jessica** on Wednesday, November 14, 2012 at 5:57pm.

I have a test on this tomorrow and I swear he didn't teach this and the book's not helping either, so maybe u can:

A hwy engineer knows that his crew can lay 5 miles of hwy on a clear day, 2 miles on a rainy day, and only 1 mile on a snowy day. Suppose that the probabilities are as follows:

Outcome prob/random variable: clear .6/5, rain .3/2, snow .1/1

Find the mean (expected value) and the variance

Can anyone at least tell me where to start????

## Answer This Question

## Related Questions

- Stats - So i have a test in stats tomorrow and im trying to work on my study ...
- to ms.sue - is there a website where i can take a review test of the test i have...
- math HELP - what is the most easiest way( or can you teach me) for Pythagorean ...
- reading - I need help with questions for the book a boy named slow.Thanks. The ...
- Chemistry - i dont understand electron affinity and it isnt in our text book at ...
- 8th Grade Chemestry - Helping my child study. Are there any online guides that ...
- 8th Grade Chemestry - Helping my child study. Are there any online guides that ...
- 8th Grade Chemestry - Helping my child study. Are there any online guides that ...
- english - How do I know when to use lay or lie? Thank you for using the Jiskha ...
- AP U.S History - Are there any AP U.S History websites that explain the chapters...

More Related Questions