D-------P
R1 R2 R3
D - driver seat
P - passenger seat
R1 = rear 1
R2 = rear 2
R3 = rear 3
Case 1 :
D can be filled in 2 ways with either parent
P can be filled in 2 ways with either parent not driving or son
R1 can be filled in 2 ways by either sister
R2 has to filled by who ever did not get to sit on P (either son or parent) 1 way
R3 can be filled by left out sister.
total ways in this case = 8
Case 2
D can be filled in 2 ways with either parent
P can be filled in 2 ways with either sister
R1 can be filled in 3 ways by sister who did not get the P seat, son or parent who is not driving
R2 has to filled 2 ways by (sister who did not get the P seat, son or parent who is not driving) -1 as one of these must have sat on R1
R3 can be filled by left out person
total ways in this case = 24
Total overall cases = 24+8 = 32.
"Single Malt is better than Blended"
