Question: Use a graphing utility to evaluate nCr . 1. 16C2 2. 17C5 3. 20C6 4. 50C8 5. Write all combinations of two letters that can

Use a graphing utility to evaluate nCr .
1. 16C2
2. 17C5
3. 20C6
4. 50C8
5. Write all combinations of two letters that can be formed from the letters A, B, C, D, E, and F. (Order is not important.)
6. To conduct an experiment, researchers randomly select five students from a class of 20. How many different groups of five students are possible?

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