Answer
A) 2.5
Work Step by Step
In this problem, you must find two averages. The first one is for the original 8 games.
$(65+58+72+74+82+67+75+71)\div8$
$564\div8$
$70.5$
You then must solve for the average of the original 8 games and a 93 point game.
$(65+58+72+74+82+67+75+71+93)\div9$
$657\div9$
$73$
Finally, find the difference between the two averages.
$73-70.5$
$2.5$
