Combinations and Permutations

“A committee of 3 students is being formed from a group of 10. Does the order in which the students are selected matter? Explain why or why not, and state whether this situation requires combinations or permutations. A password for a website requires 8 unique characters. Does the order of the characters matter? Explain why or why not, and state whether this situation requires combinations or permutations. Four different prizes are to be awarded to four different people out of a group of 20. Does the order in which the prizes are awarded matter? Explain why or why not, and state whether this situation requires combinations or permutations.”