Padma is trading cards with Robert. Padma started with 75 cards and traded 2 or her valuable ones for 10 of Robert's cards. Robert started with 88 of his own cards and traded another 8 of his cards for 15 of Padma's cards. How many cards were traded between both Padma and Robert?
Padma traded 2 + 15 of her cards = <T>add(2, 15)=17 cards.
Robert traded 10 + 8 of his cards = <T>add(10, 8)=18 cards.
In total, between both of them Padma and Robert traded 17 + 18 = <T>add(17, 18)=35 cards.
