###Human: Jeremy buys 3 bags of chips for a party. Stacy and Emily also buy chips for the party. If they need 10 bags of chips total, and Stacy buys 4 bags, how many bags of chips should Emily buy?, ### Assistant: Jeremy and Stacy buy 3+4 = 7 bags of chips.
Since there needs to be 10 total, Emily should buy 10-7=3 bags of chips. 
 So the answer is :  3