The correct answer is:
She had $40 left.
Step-by-step explanation:
She had $75 to begin with. Giving 1/3 of it away means she gives away
1/3(75) = 1/3(75/1) = (1*75)/(3*1) = 75/3 = 25
After she gives way $25, she has
75-25 = $50 left.
Giving away 1/5 of this balance means she gives away
1/5(50) = 1/5(50/1) = (1*50)/(5*1) = 50/5 = 10
This gives her
50-10 = $40 left.