I think it is 2*7*3!*3!

If we take the arrangement: bgbgbg_

there are 7 choices for "_"

Also if we take gbgbgb_, there are 7 choices for the "_"

And for each of the two cases above, there are 3!*3! arrangements for boys and girs

Total choices = 2*7*3!*3!

OA please?

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