Permutation and Combination Exercises

Exercises

Question 1

How many permutations of 3 different digits are there, chosen from the ten digits 0 to 9 inclusive?
 

Question 2

How many permutations of 4 different letters are there, chosen from the twenty six letters of the alphabet?
 

Question 3 

How many different committees of 5 people can be chosen from 10 people?

Permutation and Combination

What's the Difference?

I’ve always confused “permutation” and “combination” — which one’s which?