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22-08-2017
Mathematics

contestada

How many strings can be formed using the letters a, b, c, d, e, f, with each letter used once, that that start with the letter f?

Respuesta :

22-08-2017

Hello,
the only letters a,b,c,d,e have to be put.
So 5!=1*2*3*4*5=120

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