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:
the last won
Step-by-step explanation:
Answer:
16.875
Step-by-step explanation:
135 divided by 8 equals 16.875
2.84 per month, 0.71 per week
Step-by-step explanation:
52/4 =13 months
36.95/15=2.84
31.95/52 = 0.71