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Junior | Next Rank: 30 Posts
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help me

by shuwa » Wed Sep 28, 2011 10:10 am
- 33 students mean 13 years old , if 3 students leave 17, 18 , the youngest 5 years old out group. What the mean of remaining students?

- Chord and diamter of 2 cirle C, D. Will C be larger than B if chord and diameter > B?
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by VivianKerr » Thu Sep 29, 2011 6:37 am
Average = Sum of terms / # of terms

13 = Sum / 33

429 = Sum

Now 17, 18, and 5 are leaving.

New Sum = 429 - (17 - 18 - 5)
New Sum = 389

New Total of Students = 33 - 3 = 30

New Average = New Sum / New Total of Students
New Average = 389 / 30 = 12.966
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