There are 5 boys and 4 girls in a class. in how many ways can they be seated in a row of 9 chairs such that at least 3 girls are all next to each other?

I calculated this by multiplying 4x3x2x6x5x4x3x2x1 which equals 17280

So the question ask to find or calculate how many ways can the boys and girls in a row of 9 chairs such that at least 3 girls are all next to each other where there are 5 boys and 4 girls and the number of ways is 7 ways. I hope you are satisfied with my answer and feel free to ask for more.