Answer:
[tex]Average = \$873[/tex]
Step-by-step explanation:
Given
$1000 for 9 days
$750 for 10 days
$850 for 4 days
$900 for other days
Required
Compute the daily average
First, we need to compute the number of days her balance is $900
Assuming the billing cycle is 30 days;
[tex]Number\ of\ days = 30 - (9 + 10 + 4)[/tex]
[tex]Number\ of\ days = 30 - 23[/tex]
[tex]Number\ of\ days = 7[/tex]
The Average is then calculates using:
[tex]Average = \frac{\sum fx}{x}[/tex]
[tex]Average = \frac{1000 * 9 + 750 * 10 + 850 * 4 + 900 * 7}{9 + 10 + 4+ 7}[/tex]
[tex]Average = \frac{26200}{30}[/tex]
[tex]Average = 873.333333333[/tex]
[tex]Average = \$873[/tex] --- Approximated
Answer:
9(1000) + 10(750) + 4(850) + 7(900)
30
Step-by-step explanation: I got it right
