posted by purple on .
A basketball player has
made 135 free throws in 180 attempts. Of the next 50 free
throws attempted, how many would she have to make to
raise her percent of free throws made by 5%?
Her current percentage of successes is 135/180 = 75%.
She now makes 50 more free throws, for a total of 180+50 = 230. She wants to get 75% + 5% = 80%. How many of those 230 does she need to make?
Subtract 135 to find the number of free throws out of the extra 50.