Answer:
c I hope this helps and have a good day
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.
It depends on what type on angle it is. If it is a complementary angle its going to be 90 degree, If it is supplementary is going to be 180 degree. If it is complementary , 90-the #of the given angle. If it is supplementary, 180-#of the given angle.
Are you needing to solve the equation ? If so it’s y=2x+3
X=number of boys.
y=number of girls.
we suggest this system of equation
x/y=9/7
x=y+116
We solve this system of equation by substitution method.
(y+116)/y=9/7
7(y+116)=9y
7y+812=9y
9y-7y=812
2y=812
y=812/2=406
x=y+116
x=406+116=522
answer: At the school there are 522 boys and 406 girls.
to chek.
522/406=1.2857...
9/7=1.2857...
The number of boys (522) is equal to 406+116=522.