For Q1, you can choose a president 10 ways, and then for each choice of president, your council will consist of three people from a group of nine.
For Q2, I think the answe is (n+k-1)C(k) .
1.) In a club of 10 members...How many ways are there to choose a President, and an Advising Council of 3 members?
2.) A deli offers ham sandwiches, roast beef sandwiches, cheese sandwiches, turkey sandwiches, and salami sandwiches. You are sent in to buy sandwiches for a group of ten people for lunch. How many different ways can you order lunch?
3.) In a club of 10 members...How many ways are there to choose a President, a Vice President, a Secretary, and a Treasurer?
I'm I correct w/ using nCr (n=10,r=4) .... which equals 210 different ways?