Complete Solution of 12(b)
Data:
Persons = 5
Ahmad, Ali, Akbar, Nasir and Shehbaz
Cities = 5
V, W, X, Y and Z
Modes of Transport = 5
Bus, Train, Aeroplane, Car and Boat
Scenario:
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat
Shehbaz Train
Bus ≠ X, W
Boat ≠ X
So,
The remaining mode of transport is now Bus
and the remaining person is Ahmad
so, Ahmad must traveled by Bus
and
Remaining Cities are X, W and Z
Therefore,
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat
Shehbaz Train
Ahmad Bus
As there is no Bus Service towards X and W.
So, there is two possibilities which are:
#1
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat W
Shehbaz Train
Ahmad Bus
#2
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat
Shehbaz Train W
Ahmad Bus
So, Now There is two further possibilities of each case (#1 and #2) having total of 4 possibilities or scenario
#1
[Possibility 1]
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat W
Shehbaz Train V
Ahmad Bus Z
#1
[Possibility 2]
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat W
Shehbaz Train Z
Ahmad Bus V
#2
[Possibility 3]
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat V
Shehbaz Train W
Ahmad Bus Z
#2
[Possibility 4]
Person Mode of Transport City
Akbar Car Y
Ali Aeroplane X
Nasir Boat Z
Shehbaz Train W
Ahmad Bus V
Questions:
i. How did Ahmed travel and where did he go?
So, by viewing these 4 Possibilities
Ahmed must traveled through Bus to either go to the City V or Z.
ii. Which mode of transport was used by the person who traveled to X city?
In every possibility
Ali traveled through Aeroplane to reach the city X.
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