### Home > CC3 > Chapter 1 > Lesson 1.1.4 > Problem1-32

1-32.

Latisha is determined to do well in school this year. Her goal is to maintain at least an $85\%$ average (mean) in all of her courses.

1. Latisha started her history class with two scores on tests, $72\%$ and $89\%$. Confirm that the mean of these two scores is $80.5\%$. Show your work.

To find an average, add the scores Latisha received together and divide by the number of scores she had.

$\frac{(72+89)}{2}=80.5$

2. Latisha’s third score was $90\%$. Use her scores from part (a) to figure out her mean now. Be sure to show your work.

Remember you now need to add $90\%$ to the scores and divide by the number of scores you have now.

$83.67\%$