Permutation & Combination Doubt

What is wrong with my method
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iTeachChem Helper
@Apu
iTeachChem Helper
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.
Percy
PercyOP5mo ago
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Gamertug
Gamertug5mo ago
i dont understand , how can u guarantee mid point will have integral solution
SirLancelotDuLac
odd+odd=even, even+even=even logic.
Gamertug
Gamertug5mo ago
she did 2x5 for all 3 that will also include odd + even + even which is odd or is there smth i dont understand
SirLancelotDuLac
We are not adding the x, y and z components, we are only concerned with 2 x components, 2 y components...etc
Gamertug
Gamertug5mo ago
oooh i get it nw mb
SirLancelotDuLac
Ah I see. Its just that you have taken the order of selection into account and hence, are getting an additional factor of 2.
Percy
PercyOP5mo ago
I am sorry but I don't get it...can you explain it again pls
SirLancelotDuLac
I mean let the points be (a,b,c) and (d,e,f). Ig the case (a,b,c),(d,e,f) amd (d,e,f)(a,b,c) are counted separately which should not be the case
Percy
PercyOP5mo ago
ohhhhh Got it thanks +solved @SirLancelotDuLac
iTeachChem Helper
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