Question

Question:-
There are 4 boxes. Find the total number of arrangements if we can arrange only 2 boxes at a time
Choices:-
15.0
18.0
12.0
20.0
​

Answer 1

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Answer 2

Given :  There are 4 boxes.

To Find :  the total number of arrangements if we can arrange only 2 boxes at a time

 15.0

18.0

12.0

20.0

​

Solution:

2 Boxes out of 4 can be selected in ⁴C₂   = 4!/2!.2!  =  6 way

2 Boxes can be arranged in 2 ways

Hence total possible arrangement = 6 * 2  = 12  

Hence  the total number of arrangements if we can arrange only 2 boxes at a time = 12

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