Answer:
5 + 5 =10
Step-by-step explanation:
it should have been 4 +6 = 10
Answer:
(a) 0.9412
(b) 0.9996 ≈ 1
Step-by-step explanation:
Denote the events a follows:
= a person passes the security system
= a person is a security hazard
Given:

Then,

(a)
Compute the probability that a person passes the security system using the total probability rule as follows:
The total probability rule states that: 
The value of P (P) is:

Thus, the probability that a person passes the security system is 0.9412.
(b)
Compute the probability that a person who passes through the system is without any security problems as follows:

Thus, the probability that a person who passes through the system is without any security problems is approximately 1.
You would set it up like this: 150x + 280 = 255x The you just solve.
If you have 60% out of 40 students that is 24 students
it means that u have to ratios that are equivalent in weight meaning 3:3 = 1 and so is 6:6=1