Question 732403
The X's in this question are 3, 5, 5, 5, 5, 6, 6, 8, 8, and 9 

 So to calculate (ΣX)/n, just add all those values (3, 5, 5, 5, 5, 6, 6, 8, 8, and 9) and divide by the number of values given. 

 Answer: 
 (ΣX)/n = (3+5+5+...+9) / 10 

 To calculate (Σ(X + 5))/n, just add each value given with 5. 

 Answer: 
 (Σ(X + 5))/n ={ (3+5) + (5+5) + ... + (9+5) } / 10