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Question
If the mean of 11 , 14 , p , 26 , 10 , 12 , 18 , 6 is 15, find p.
Solution
Numbers are = 11, 14, p, 26, 10, 12, 18, 6
Mean= 15
n=8
`barx = (x_1 + x_2 + x_3 + .... + x_n)/n`
⇒ `15 = (11 + 14 + p + 26 + 10 + 12 + 18 + 6 )/8`
⇒ `15 = (97 + p)/8`
⇒ 97 + p = 120
⇒ p = 23
The value of p = 23
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