If you do 7.75 divide by .84, you can get you answer since she onlyhas the much and the avocados are taking up that amount of money.[tex] \frac{7.75}{.84} =9.226[/tex]
He can buy 9 avocados, since you can not buy a fraction of an avocado and he doesn't have enough for 10.
Tell me if this helps!!!