Combinations on multisets and ordered pairs

Question

I came across this question while doing some revisions. There are 3 parts to this question. One of them I asked here before.

Suppose you have a series of scrabble tiles, each tile has one letter on it, and a point value in the bottom right-hand corner (e.g. "C" is worth 3 points).

Note that there are some repeated tiles. For example, the two S tiles are identical. For the first 3 parts of the question, we place all of the above tiles into a bag and then draw 2 tiles out of the bag.

1. How many sets of two tiles can be selected from the bag if we insist that the two chosen tiles contain different letters?

2. How many different multisets of 2 tiles can be selected from the bag?

3. Suppose that I take one tile from the bag, and then take another tile. How many possible ordered pairs of tiles can I form in this way?

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My method

1. I cancelled out the repeating tiles, so I have "C O M P S I T N",

   then, from these 8 tiles I did $_8C_2$ = 28

2. I'm not sure how to do combinations with multisets

3. I'm also confused about "ordered pairs"

Can anyone help me out in solving these questions? Also in checking if I did question 1 correctly, because I have my doubts. Thanks in advance