Answer:
a. 3x^2 = 81
   x^2 = 27

Step-by-step explanation:
 
        
             
        
        
        
Answer:
28
Step-by-step explanation:
The binomial coefficient is calculated as:

It means that there are nCx ways to select x elements from a group of n elements.
So, If the researcher wants to determine the probability that 6 out of the next 8 individuals in his community are in favor of the president, we can replace n by 8 and x by 6 and calculated the binomial coefficient as:

 
        
             
        
        
        
The answer is 360 -15 times -24 equals 360
        
                    
             
        
        
        
The range is the difference between the highest and lowest values in a set of numbers. To find it, subtract the lowest number in the distribution from the highest.
        
                    
             
        
        
        
1 and 3 I believe sorry if it’s incorrect