Question
Nine people are entered in a race. If there are no ties, in how many ways can the first three places be awarded?
3
252
472
504
3
252
472
504
Answers
MathMate
How many choices for the first place? 9
How many choices for the second place? 8
(because there are only 8 people left after the first place)
How many choices for the third place? 7
How many ways altogether? use the multiplication rule.
How many choices for the second place? 8
(because there are only 8 people left after the first place)
How many choices for the third place? 7
How many ways altogether? use the multiplication rule.
jenny
504?
MathMate
yep! That's correct!