SOLUTION: There are two rows of seats in the classroom and each row has six seats. If a class has nine students, and among them three female students G1, G2 and G3 always sit in the first ro

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Question 971882: There are two rows of seats in the classroom and each row has six seats. If a class has nine students, and among them three female students G1, G2 and G3 always sit in the first row, two male students B1, B2 always sit in the second row. In how many different ways can all the nine students sit in the classroom?

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
We are dealing with two rows, 7 vacant seats, and 4 students. There is no comment about the order in which the students sit in each row or the gender of the other students. It is an issue of picking 4 people to fill 7 different slots.
Therefore, it is 7C4=35 different ways.