An inline skate has 4 wheels. How many ways could 4 replacement wheels be chosen from a pack of 10 wheels and fitted to a skate?
1 Answer
Feb 5, 2016
5040 ways
Explanation:
1st wheel can be chosen in 10 ways, then 2nd wheel can be chosen in 9 ways then third in 8 ways and 4th in 7 ways. The total number of ways= 1098*7 = 5040 ways
