the mean marks of 30 students in a class is 70 find the marks of the topper if the mean marks of others is 69
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11
Answer:
99
29 = 69
30 = 70
clearly we can see that average increases by 1 when one member added.
This 1 will effect all 29 members
1×29 = 29
Marks of the topper = 29 + 70
= 99
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7
The marks of the Topper is 99.
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