Answer:
20% i am not 100% sure. if i am wrong, i am sorry
1/2 I guess I don't think you typed in the question correctly. Not trying to be mean.
Answer:
one time
Step-by-step explanation:
because after that you would subtract by 20
Permutation: In a race of 10 students, find the number of ways students can finish 1st, 2nd, and 3rd. In this case the order matters, so it is a permutation.
10 x 9 x 8 = 720 ways
Combination: In a class of 10 students, find the number of ways a group of 3 students can be selected to win a prize. In this case the order doesn't matter, so it's a combination.
10 x 9 x 8 / (3 x 2 x 1) = 120 ways
