1. "It's too bad Susan's Labrador didn't get first prize at the show," said Linda. "Well, I suppose there were a lot to choose from," Dick replied. "And a lot of people in that hall, I'm sure." Linda smiled. "No, it wasn't crowded," she told him. "There were forty heads there, and a hundred legs, all people and dogs." How many of each?

20 people, 20 dogs.

35 people, 5 dogs.

30 people, 10 dogs.