Question

HEY FRNZ .....PLS ANS THIS QUESTION.....IT'S URGENT....PLSSS....♥️♥️♥️ ...

PLS ANSWER THE 3rd ONE...

Answer 1

$mean = \frac{sum \: \: of \:all \: observation}{total \: no \: of \: observation}$
let sum of all observation be x
$77 = \frac{x}{9 }$
x=77×9=693
acc to ques if one number is more added then main increases by 5 that is 82
let new no. be y
$\frac{x + y}{10} = 82 \\ = x + y = 820 \\ 693 + y = 820$
$y = 820 - 693 =1 27$