5
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There are three possibilities:-- 7 equal groups, with 3 in each group-- 3 equal groups, with 7 in each group-- 21 equal groups, with 1 in each group
300 chairs I got 12 chairs for each row but I don't really understand the question.
It is elementary division.
20
If you have 65 chairs with five chairs in each row, you would have a total of 13 rows. This can be calculated by dividing the total number of chairs (65) by the number of chairs in each row (5). The result of 65 divided by 5 is 13 rows.