Can i lose weight by eating just cereal, salad, and drinking a full glass or apple juice???

yea i HAVE to return to college and I kinda made a bet with people that I would lose a lot of weight, well that obvioulsy didnt work. So I have three weeks left and Im wondering if I just eat cereal (special k or chex) salad, and water, with a glass of apple juice ( you to get the bowel movement) could I lose a lot of weight. I know its unhealthy but I n eed help anything????????????