you would add all the numbers together and then divide by how many numbers there are, so for this question you'd do 8+2+1+5+7+6+2+2+8+3 then divide it all by 10, which gives you 4.4
D. Since we know that 1 ticket = $8 we would multiply to figure out how much 7 tickets were. (7x$8). And to figure out his change you would subtract the ticket amount from $100 :) Hope this helps
