Ms. Q gave Grogg the following problem: "License plates consist of six upper-case letters. For example, two possible license plates are $ABCDEF$ and $AAAPOS.$ No two license plates are the same. How many possible license plates are there which contain at least four $A$'s?"
+37157 *** error **** deleted See Chris answer below...... I was looking for the link when he posted it !
