## General Chemistry: Principles and Modern Applications (10th Edition)

$15\,A's$, $21 \,B's$, $27\,C's$, $11\,D's$, $10\,F's$
We use the fractions to find the number of each category: $\frac{18}{100}\times84\,A's=15\,A's$ $\frac{25}{100}\times84\,B's=21 \,B's$ $\frac{32}{100}\times84\,C's= 27\,C's$ $\frac{13}{100}\times84\,D's=11\,D's$ $\frac{12}{100}\times84\,F's=10\,F's$