math
the number of ways in which 18 students in Mr. Garr grade 3 class can line up for a photo if the the Armstrong triplets cannot all be together is n x16!
what is n?
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Answers
n is the number of choices for where the Armstrong triplets can stand. There are 3 of them, so there are 3x3x3 = 27 possible arrangements of their positions in the line. So n = 27.
