Question

If the mean of 20,24,36,26,34and K is 30 find k

Answer 1

A/Q

(20+24+36+26+34+k)/6=30

140+k=180

k=180-140

k=40

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Answer 2

Mean=30
Mean(30)=20+24+36+26+34+k/(no. Of terms:6)
30=140+k/6
30*6=140+k
180=140+k
180-140=k
k=40