Find the number of 3-letter sequences that can be made using the letters in the word MICHIGAN.
Note that there are two I's.
Split it into two cases: one where you find the number of sequences with MICHGAN, and one where you have two I's and one other letter. These two are different. From there I bet you can figure it out, ask if you have questions!
You are very welcome!
:P
There are 8 letters in Michigan, so we should be able to pick 3 numbers from 8(8*7*6), but keep in mind that there are too I's.