A class adviser surveys 35 of his students on the kind of pets they have at home. He found that 15 have dogs, 12 have cats, and 8 have birds. Five have dogs and cats, 4 have dogs and birds, and 2 have cats and birds. If no one has all three kinds of pets, how many students have none of these pets? Your answer

In a survey of 1000 students it was found that 840 own a cell phone, 450 own an MP3 player and 370 own both. How many students own neither?

In the Summer Olympics, there were eight runners in the final of the men's 100 meter dash. This race included two runners representing USA. How many possible outcomes could we have seen on the podium that didn't include either of the two Americans? That is to say the podium has no USA runners (six of the runners are non-USA runners). Remember the podium represents an ORDERED finish.

Question 2 A boy owns 5 pairs of pants, 3 shirts, 2 ties, and 2 jackets. How many different ouutfits can he wear to school if he must wear one of each item? He can wear different outfits.