My friend Asha was throwing a very grand party and wanted to borrow from me 100 wine glasses. I decided to send them through my boy servant Harish.
Just to give an incentive to Harish to deliver the glasses intact I offered him 3 cents for every glass delivered safely and threatened to forfeit 9 cents for every glass he broke.
On settlement Harish received $2.40 from me.
How many glasses did Harish break?