Please help! I'll give you a medal.

How many times can six books be arranged on a shelf.
A. 21
B.120
C.360
D.720

2. There are eight girls competing in a ice Skating competition.In how many ways can they finish in first, second, and third place?

A. 336
B.1680
C.2016
D.40320

Question

Please help! I'll give you a medal.

How many times can six books be arranged on a shelf.
A. 21
B.120 
C.360
D.720

2. There are eight girls competing in a ice Skating competition.In how many ways can they finish in first, second, and third place?

A. 336
B.1680
C.2016
D.40320

campbell_st · Answer

1. well its simply

6 x 5 x 4 x 3 x 2 x 1 = 

2. 

how many can finish 1st:  8

                               2nd:  7

                               3rd:   6

so the number of arrangements is 

8 x 7 x 6 =

anonymous · Answer

Thank you!