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ijohnh14
07.03.2020 •
Mathematics
Because not all airline passengers show up for their reserved seat, an airline sells 125 tickets for a flight that holds only 120 passengers. The probability that a passenger does not show up is 0.10, and the passengers behave independently. Round your answers to four decimal places (e.g. 98.7654).
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Ответ:
Answer is 0.9738
Step-by-step explanation:
Given, n == 125
Probability that passenger will not show up, q = 0.10
Probability that passenger will show up, p = 1 - q
= 1 - 0.10
= 0.9
The probability that the flight departs with empty seats.
μ = np ==> 125 x 0.9 ==> 112.5
σ = √npq ==> √125x0.9x0.1 ==> 3.354
∴ P( Z ≤
)
P ( Z ≤ 1.94 )
= 0.9738
Ответ:
I believe it is 24
Step-by-step explanation:
Pythagorean theorem: a^2+b^2=c^2
We know A and C
7^2+b^2=25^2
Now we need to solve for B
We know that A+B will equal C
So C-A=B
25^2-7^2=576
Now we have to find the square root of 576 which is 24