Question 1187146
There are 7 boys and 3 girls in gathering. In how many ways can they be arranged in a row so that the 3 girls form a single block 
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Assuming no differences in the 3 girls in the block:
---> 8 elements
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1 of 8, then 1 of 7, .... etc
8*7*6*5... =  8!
8 factorial.  Not an excited 8.