Answer:
banana$1.45,Apple $$1.30,orange $1.30
Notice that for implies that elsewhere, since
where is a random variable representing cable lengths according to the PDF .
a. By definition of expectation, the mean is
The variance is
where
so that the variance is , making the standard deviation .
b. The proportion of cables within specs is
The anwer is -88
-h/88-4/8(+4/8)=4/8(+4/8)
-h/88=1
-h/88(88)=1(88)
-h/(-1)=88/-1
=-88
the time for both would be 1:17