#### orangeflow

##### New member

- Joined
- Jan 14, 2010

- Messages
- 4

((1/5)3+(1/5)4.5+(1)6)/3=4.8

Ive been told that the answer to this problem is 4.8 but I dont know how. The above equation is the farthest I have gotten to a solvable equation, but is clearly not right. I know that if the machine had an equal chance to fire at 3sec, 4.5sec, and 6seconds the average firing time would be 4.5, but since it only has a 20% chance for 3sec and 20% chance for 4.5sec I dont know how the correct answer is 4.8.