Question

100 POINTS HELP PLS...

For four Fridays in March, Charise earned $15.50, $26.75, $30.00, and $27.25 from babysitting.
In April, she earned $16 more for babysitting four Fridays than she did in March.
What is the increase in the mean for April compared to March?

Round the answer to the nearest penny.

$4.00

$3.00

$2.00

$1.00

Answer 1

$4.00

Explanation:

To calculate the mean for the four Fridays in March, you add each payment she received and then divide it by the number of times she was paid:

(15.50+26.75+30.00+27.25) / 4 = 24.875

To calculate the mean for the Fridays in April, I did something different. I computed the mean in the same way, but I chose not to include the extra 16 in the division.

(15.50+26.75+30.00+27.25+16.00) / 4 = 28.875.

28.875 - 24.875 = $4.00

Extra explanation:

If you are wondering why I didn't include 16 in the division for the second part of the problem, it's because it would lead to a negative.

If I included 16 in the division, the result would have led to 23.1.

23.1 - 24.875 = -1.775

Answer 2

I’m pretty sure the answer is 4
The reason for that is because 15.50+26.75+30.00+27.25=99.5
99.5/4=24.875
Then 19.50+30.75+34.00+31.25=115.5
115.5/4=28.875
28.875-24.875=4