if mean of following frequency distribution is 8,find the value of k..
Answers
x y xifi
2 4 8
4 7 28
6 10 60
8 16 128
10 k 10k
12 3 36
8=40+k/260+10k
8(260+10k)=40+k
2080+80k=40+k
80k-k=40-2080
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