Using {0, 1,3,4, 6} without repetitions: a. How many 3 digit numbers can be made? b. How many will be even? c. How many will be greater than 335? 6 people are waiting for a bus. a. How many different ways can they line up? b. How many ways if 2 of the people insist on being next to each other? c. How many ways if 2 of the people refuse to be next to each other?