Answer:
it's 60
Step-by-step explanation:
I have done that before
Answer:
Cant see the full photo {error}
Answer: a) 
Step-by-step explanation:
Given : For safety reasons, four different alarm systems were installed in the vault containing the safety deposit boxes at a Beverly Hills bank.
Each of the four systems detects theft with a probability of .99 independently of the others .
Probability for independent events
occurs together =
.
Then, the probability that when a theft occurs, all four systems will detect it
= (0.99) x (0.99) x (0.99) x (0.99)

Hence, the probability that when a theft occurs, all four systems will detect it is
.
Hence, the correct answer is a)
.
Answer:
4.03 is your answer.
Step-by-step explanation:
4.836 divided by 1.2
4.836/1.2 = 4.03
4.03 is your answer.