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.
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Answer:
see this img
Step-by-step explanation:
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Answer: Radius is 15.9975 meters.
Step-by-step explanation:
The formula to find radius of circle is r=
so plug in our known variables and solve...
r=
r=
r=15.9975