You would be subtracting by 5 so the next three would be -16, -21, -26
        
             
        
        
        
Answer:
The median grade would be 89
Step-by-step explanation:
To find the median, first put the numbers all in ascending order. 
79, 80, 86, 92, 95, 96
Now isolate the middle term or terms. Since there is an even amount of numbers, we pick the two in the middle. To find the median, we take an average of those terms. 
(86 + 92)/2 = 89
 
        
                    
             
        
        
        
Answer:
This can be found by using the permutations and combinations formuals.
Combinations being the C equation and Permutations being the P equation.

Explanation:
A permutation is used for the list of data (where the order of the data matters) and the combination is used for a group of data (where the order of data doesn't matter).