Question

1. 15 people are divided into 2 groups one with 5 and the other with 7...

1. 15 people are divided into 2 groups one with 5 and the other with 7 people in them. How many ways are there to do this?

2. 10 people including Mr.Joe and Mr.T are to be seated in a row. How many ways are there to do this so that they don't sit together?

Please answer the problems using the easiest method possible. Thank You

Math   Advanced-Math   
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