8.9 because you divide and multiply or u can just plug and chug
As the sum of marks of others remain unchanged , let their sum be x . As the mean using 83 was 40 , we have ,
(x +83)/100 = 40
x + 83 = 4000
x = 3917
Now mean using 53 ,
(x +53)/100
(3917+53)/100
39.7.
Hope it helps , plz mark as brainiest :-)
Michael bought 3.5 lbs of cheese
Divide 11.48 by 3.28
-7 times -8 is 56 and -40 divided by 10 is -4
