### Home > CAAC > Chapter 1 > Lesson 1.1.2 > Problem1-12

1-12.
1. Latisha is determined to do well in school this year. Her goal is to maintain at least an 85% average in all of her courses. Homework Help ✎

1. Latisha started with two scores: 72% and 89%. Confirm that the average of these two scores is 80.5%. Show your work.

2. Latisha's third score is 90%. Use her scores from part (a) to figure out her average now. Be sure to show your work.

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

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

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

83.67%