###Human: The number of cards in a card game was 500. Two friends Ellis and Orion, playing together, divided the cards in the ratio of 11:9. How many more cards did Ellis get than Orion?, ### Assistant: The total ratio representing the 500 cards is 11+9 = 20
The fraction of the total ratio that represents the number of cards that Ellis got is 11/20, and since there were 500 cards, Ellis got 11/20*500 = 275
If there were 500 cards, and Ellis received 275 cards, Orion received 500-275 = 225 cards
The number of cards that Ellis received more than Orion is 275-225 = 50 cards. 
 So the answer is :  50