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28.10.2020 •
Mathematics
) How many such stations are required to be 98% certain that an enemy plane flying over will be detected by at least one station
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Ответ:
Complete Question
The probability that a single radar station will detect an enemy plane is 0.65.
(a) How many such stations are required to be 98% certain that an enemy plane flying over will be detected by at least one station?
(b) If seven stations are in use, what is the expected number of stations that will detect an enemy plane? (Round your answer to one decimal place.)
a
b
Step-by-step explanation:
From the question we are told that
The probability that a single radar station will detect an enemy plane is
Gnerally the probability that an enemy plane flying over will be detected by at least one station is mathematically represented as
=>
=> Note
=>
=>
Generally from binomial probability distribution function
Here C represents combination hence we will be making use of of combination functionality in our calculators
Generally any number combination 0 is 1
So
=>
taking log of both sides
=>
=>
=>
=>
=>
Gnerally the expected number of stations that will detect an enemy plane is
=>
Ответ:
671 im not sure if its right
Step-by-step explanation:
i divided 183÷3=61 and 61×11=671 at same speed.