Question

Subject: Elements of Set Theory

Greetings,

I am really having difficult time with these problems that my professor simply created. Could you please help me out.

Step 1

To prove the formula for the required number of combinations

Step 2

To start with, the correct statement of the problem is as shown: n has to be greater than or equal to 3.

Step 3

First we prove this by applying t...

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Sorry about that. What wasn’t helpful?