Mutually exclusive means it can't happen at the same time, so those events are mutually exclusive.
I hope this helps! :)
Rossane puts 5/20 liters in her thermos and her brother drinks 8/20 liters so there is 17/20 liters left
It's 20.
12/x=3/5
Then cross multiply 12*5 and 3*x
3x/3=60/3
x=20.
Answer:
x= 38 degrees
Step-by-step explanation:
angle 2 and angle 3 is a straight line which is 180 degrees.
So,
4x + 28 = 180
4x = 180 -28
4x = 152
x= 152/4
x=38
Answer:
Percentage of the students scored higher than 89% = 65.87%
Step-by-step explanation:
We need to find the percentage of students who scored higher than 89% given mean = 84 and standard deviation = 5.
We can find the percentage of students who scored higher than 89% by using z-score.
The formula for z-score is:
μ= mean = 84
σ=standard deviation = 5
x= random number = 89
Putting these values, we get
Now, we know that we need to find students who score greater than 89%
so P(X>89) or P(X>1),
finding value of z= 1 which can be easily found using z score tables.
By looking at table we get the value of z = 0.3413
Subtracting the value of z from 1 we get
Percentage of the students scored higher than 89% = 1-0.3413 = 0.6587 or 65.87%