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:
look at the picture i have sent
Answer:
2/2 3/3 4/4 5/5
Explanation: Have the fraction sign act like a division sign. 2 divided by 2 is 1. 3 divided by 3 is 1, and so on
There are 1.6 5/8's in 1
1.6 is the same as 8/5.
The are 8/5 5/8's in 1
Another way to solve this problem is:
Since we can set it up as:
1/

=8/5
We can also set the problem up as:
5/8*x=1
Then, we can apply the reciprocal rule:
a/b*b/a=1
5/8*8/5=1
The final answer is there are 8/5 5/8's in 1