Answer:
0.36427
Step-by-step explanation:
Mean = λ = 18 messages per hour
P(X = x) = (e^-λ)(λ⁻ˣ)/x!
P(X ≤ x) = Σ (e^-λ)(λ⁻ˣ)/x! (Summation From 0 to x)
But the probability required is that the messages thay come in an hour is between 15 and 20, that is, P(15 < X < 20)
P(15 < X < 20) = P(X < 20) - P(X ≤ 15)
These probabilities will be evaluated using a cumulative frequency calculator.
P(X < 20) = 0.65092
P(X ≤ 15) = poissoncdf(18, 15) = 0.28665
P(15 < X < 20) = P(X < 20) - P(X ≤ 15) = 0.65092 - 0.28665 = 0.36427.
You can use the Poisson distribution calculator here
https://stattrek.com/online-calculator/poisson.aspx
2940. To find LCM, listing the multiples may help. Then you will easily be able to view them and circle when you find a common one. :)
No, there are lots of quadrilaterals. <span>Examples of other quadrilaterals
are rhombus, kite, trapezoid, parallelogram etc</span>
B.) 24 in
This is because you will divide this shape into 2 rectangles find the area of both of them and then add them together
9/2 is the simplest form of 18/4.
Hope that helps.
