In question given that,
$11,14,p,26,10,12,18\And 6$
Mean $=15$
We have to find the value for p,
Whereas n is the total number
\[N=8\]
$\bar{x}=(x1+x2+..xn)/n$
$15=(11+14+p+26+10+12+18+6)/8$
$15*8=97+p$
$120=97+p$
$p=120-97$
$p=23$ Therefore,$23$is the value of p