Answer:
3
Step-by-step explanation:
A simple question, but I decided to answer.
Good Luck!!
8 X
----- = ------
20 40000
40000/20=2000
2000*8=16000
X=16000
The variance is the total of the squared distances of the given data from the mean.
This can be calculated through the equation,
σ² = summation of X² / N - μ²
where σ² is the variance X's are the data, N is the number of terms, and μ is the mean.
summation of X² = 100² + 100² + 120² + 120² + 180² = 81200
N = 5
μ = (100 + 100 + 120 + 120 + 180) / 5
μ = 124
Substituting these values to the equation for variance,
σ² = (81200/5) - 124² = 864
Thus, the variance is equal to 864.
I hope I'm not wrong here, but B.1/2? Only because its a 50% chance
Essentially 11(4d + 6) = 11*4d + 6*11
44d + 66