Determining the top three students of grade 10 students in honors from the batch with you in a party. Selecting to attend together. Choosing three of your classmates to solve the problems below. Write your solution on a separate sheet of paper. 6, and r, what is the number of combinations? 6 If n, in how many ways can a committee consisting of 5 members be formed from 10 people? How many sets of 5 cards each can be formed from a deck of 20 cards? How many different sets? In a 10-item Mathematics problem-solving test, how many ways can you select problems to solve?