Provide a real-world example 0f how permutations and combinations can be used. Explain the details of your example.
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So, we know that in a combination the order does not matter, and in a permutation the order does matter. Where in the real world are there situations in which we want to know all the possible combinations of things where the order does and does not matter?
Well, what if you biked to school, and realized...
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Can u give 3 examples of permutation and combination in real life?
Permutation is the number of ways you can arrange things. The order of arranging is also considered in permutations.
The combination is the different number of ways we choose. In combination the order is not considered.
Permutation or diffrent ways of arranging 2 marbles red green in 3 places shelves A,B and C.
A B C
r g -
g r -
r - g
g - r
- g r
- r g
The number of arrangements above is 3P2 = 3!/(3-2)! =3!/1! = 3*2 *1 = 6.
In combinations it is the number of diffrent things you select.
The number of two marbles group you can do in this case of 3 diffrent marbles green, blue and red is 3 as the the number of groups you can form are :
gr,gb, br.
Here gr and rb are not different, gb and bg are not different and similarly br and rb are not different.( Whereas , in permutation, gr and rg , gb and bg, and br and rb are treated different).
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