Answer:
a
Step-by-step explanation:
Answer:
The probability of failure of both the bulbs is 0.4323.
Step-by-step explanation:
For an exponential distribution the distribution is given by

The value of λ is related to the mean μ as λ=1/μ,
Let us denote the 2 bulbs by X and Y thus the probability distribution of the 2 bulbs is as under

Similarly for the bulb Y the distribution function is given by
Thus the probability for both the bulbs to fail within 1500 hours is

Answer:
.
Step-by-step explanation:
-(2x + 3y)
= -2x - 3y
............
Answer:
b
Step-by-step explanation:
you add 80 and 16 together and subtract it from 180
so you do 180-96
and you get 84