Answer:
C is the answer
Step-by-step explanation:
hope this helps
Answer:
n = 1/2
Step-by-step explanation:
4/5(1/2) - 1/5 = 2/5(1/2)
4/10 - 2/10 = 2/10
If the regular price is x, the discount would be x - (30x)
Also the guitar is $31.5
See pic below for the answer
Answer:
0.1512 = 15.12% probability that fewer than four tornadoes occur in a three-week 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.
In a given region, the number of tornadoes in a one-week period is modeled by a Poisson distribution with mean 2
Three weeks, so 
Calculate the probability that fewer than four tornadoes occur in a three-week period.
This is:

In which





Then

0.1512 = 15.12% probability that fewer than four tornadoes occur in a three-week period.