Question

Five hundred customers were asked to rate a service on a scale of 1 (terrible) to 5 (perfect). Results are below: Number of customers; score 75; 5
105; 4
200; 3
105; 2
15; 1
What was the average rating of the service?

Answer 1

it's pretty simple, first multiple the number, 75x5,105x4,200x3,ect. then add all the numbers uo
$(105 \times 4) + (75 \times 5) + (200 x 3) + (105 x 2) + (15 \times 1)$
then divide the number by 5 (number of possible ratings)