Answer:
1 time unit
Step-by-step explanation:
There is a 1 in 3 chance that the time until the bulb burns out is zero, and a 2 in 3 chance that the time is the average between 0 and 3 (since it is uniformly distributed). Therefore, the expected value for the time until it burns is:

The expected value of the time until the lightbulb burns out is 1 time unit.
You do (3)*(3)*(3)= 27
Then you do (4)*(4)*(4)= 64
Now you add them 27*64= 1728
I know this is correct because I am doing the same thing in my math class.
Hope this helps. :)
Y=2 maybe not sure though
Answer:
8
Step-by-step explanation:
40 x 0.20
= 8