What is the set of days with names containing the letter r
1 answer:
You might be interested in
Answer:
0.2081 = 20.81% probability that at least one particle arrives in a particular one second period.
Step-by-step explanation:
In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:
In which
x is the number of sucesses
e = 2.71828 is the Euler number
is the mean in the given interval.
Over a long period of time, an average of 14 particles per minute occurs. Assume the arrival of particles at the counter follows a Poisson distribution. Find the probability that at least one particle arrives in a particular one second period.
Each minute has 60 seconds, so
Either no particle arrives, or at least one does. The sum of the probabilities of these events is decimal 1. So
We want . So
In which
0.2081 = 20.81% probability that at least one particle arrives in a particular one second period.
Answer:
3 cm
Step-by-step explanation:
So the area of the total circle is:
If you remove the outer band you have the area of the inner circle
This means that the inner circle had an area of
area = pi * r^2
9 pi = pi * r^2
r =
So the radius of the inner circle is 3.