Question

Jamila babysits to earn money. The mean amount she

earns each time she babysits is $24. If she babysits
nine evenings and earns the following amounts: $15,
$20, $10, $12, $20, $16, $18, and $25, how much did she
earn the ninth evening?​

Answer 1

$80

Explanation:

Give jamila's Mean earning = $24

let her ninth earning be x

we know that mean= (∑sumation of earnings)/number of earnings

`24= (15+20+ 10+ 12+ 20+ 16+ 18+ 25+x)/(9)`

`24= (136+x)/(9) \\24*9=136+x\\216=136+x\\x=136-216\\x=80`

Her ninth earning is $80