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OpenStudy (anonymous):
plz help How many 3-letter code words are possible using the first 7 letters of the alphabet if letters can be repeated? a.210 b.343 c.216 d.252
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OpenStudy (raden):
The first 7 letters of the alphabet are a,b,c,d,e,f, and g. for the first code, we can taking by 7 ways. because the repeation is allowed, then the 2nd and the 3rd can be chosen by 7 ways too. so, it is 7 x 7 x 7 = 343
OpenStudy (anonymous):
thanks
OpenStudy (raden):
welcome
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