I don’t really know. But I do know that you can find the probability of 3 or fewer breakdowns for the robot line by multiplying them sequentially. No idea about the hours thing, seems very confusing to me.
Mah plot:
I’m glad you asked. I don’t know. But here is a graph:
curve(dnorm(x,200,30),120,280,main="Bagging PDF", ylab="f(x)", xlab="x")
This plot goes from 120 to 280!
It also has the deviation as 30!!!11!!
I don’t know and don’t have the time to find out. Have a good day.