Respuesta :
I'm just going to answer part A because I don't know part B.
part a.) 7*6*5*4*3*2*1=5040
so there are 5040 different ways this can be accomplished
part a.) 7*6*5*4*3*2*1=5040
so there are 5040 different ways this can be accomplished
Answer:
a.) 5040 ways.
b.) 720 ways
Step-by-step explanation:
a.)
As we have to arrange the seven pictures in a straight line this means we have the following ways to do it:
There are 7 choices for the first place and now 6 choices for the second place then 5 choices for the third place and so on.
Hence, the total number of ways are:
7×6×5×4×3×2×1=7!
=5040 ways
b.)
Now it is given that the middle place is fixed i.e. it is fixed for grandfather.
Hence, now there are total 6 pictures left that are need to be arranged in the 6 given places.
Hence now the total number of such cases possible are:
6!=6×5×4×3×2×1
=720 ways.
