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? Let's answer step by step:
Padma traded 2 + 15 of her cards = 17 cards. Robert traded 10 + 8 of his cards = 18 cards. In total, between both of them Padma and Robert traded 17 + 18 = 35 cards. The answer: 35.