If the mean of 9, 10, 11, x, 12, 6, 8, 14, 15 and 18 is 11. find the value of x.
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Answered by
15
mean =11
observation =10
sum of obs = 11×10
= 110
9 +10+11+X+12+6+8+14+15+28 = 110
X= 110-103
X= 7
Answered by
4
Answer: 17
Step-by-step explaination :
Sum of observations = 9+10+11+X+12+6+8+14+15+18 = 93+X
Total no.of observations = 10
No.of observations×mean = sum of observations
10×11 = 93+X
110 = 93+X
X = 110-93
= 17
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