Sam needs to solve 6 math questions and 4 physics questions. He does not want to solve physic questions back to back. How many ways can he arrange the sequence of the problems? Every problem is different.
and
Use the letters a,b,c to create a 5 letter word. "a" can be used at most 2 times, "b" can be used at most one time, and "c" can be used at most three times. How many possible words can you form?
