If we consider x having any other value then 0,1 or 2 then the answer is b.2x(x-1)
 
        
             
        
        
        
Answer:
Standard deviation of a normal data distribution is a measure of data dispersion.
Step-by-step explanation:
Standard deviation is used to measure dispersion which is present around the mean data.
The value of standard deviation will never be negative.
The greater the spread, the greater the standard deviation.
Steps-
1. At first, the mean value should be discovered.
2.Then find out the square of it's distance to mean value.
3.Then total the values
4.Then divide the number of data point.
5.the square root have to be taken.
Formula-
SD=
    Advantage-
It is used to measure dispersion when mean is used as measure of central tendency.
 
        
             
        
        
        
20x2 = 40 in width
180-40= 140
140/2=70
70 inches
        
                    
             
        
        
        
You have to multiply 750*100 and then divide 75,000 with 15, which gives you 5,000