20 5/81 in its simplest form is 20 5/81.
20 5/81 originally looks like this ⇒ 1625/81
((20 * 81)+5)/81 = (1620+5)/81 = 1625/81   * this is an improper fraction because the numerator is greater than the denominator. Improper fractions must be converted to proper fractions. It will then become a mixed fraction.
 
     <u>  0020  5/81</u>        
81 | 1625
       <u>162      </u>      * 81 x 2
           05
        
             
        
        
        
So,, there are 5 different flavors. A total of 180 people were asked. Hence, the hypothesis that there is no significant difference is that every flavor gets 180/5=36 flavors. x^2=

. In this case, mi is the proportion of the hypothesis, thus 36, n=180 and xi is the number of actual observations. Substituting the known quantities, we get that x^2=9. The degree of association is given by 

. This yields around 0.10, much higher than our limit.
 
        
        
        
Answer:B.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
A i think
Step-by-step explanation:
 
        
                    
             
        
        
        
Y = 180 - 51 -56 = 73
x = 180 - 73 - 72 = 35
x = 35 degrees