ksmith3894
New member
- Joined
- Aug 31, 2012
- Messages
- 13
A bag contains 1 green ball, 2 blue balls, and 3 orange balls. Two are selected simultaneously and at random, their colors are noted. The green ball is worth $23 dollars, blue $5, and orange $1. Find expected total value and standard deviation. Well I am trying to find the right probabilities but am not getting them. I know the my expected value is the sum of all the probabilities x values. I am having trouble with probabilities mostly. I know the expected value is 12 in the book, but how?