Question

find mean proportional of 9, 81

Answer 1

mean equals to sum of observation/no of observation.so,9+81÷2=90/2=45 . I hope it will help you

Answer 2

$the \: mean \: proportional \: of \: 9 \: and \: 81 \: is \: \\ \frac{9 + 81}{2} = \frac{90}{2} = 45. \\ mate \: hope \: it \: will \: help \: you. \\ please \: mark \: me \: as \: a \: brainlist.$