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From a group of 10 boys B1 , B2 . . . B1...

From a group of 10 boys `B_1 , B_2 . . . B_10` and `G_1 , G_2,. . . ,G_5` the number of ways of selection of a group of 3 boys and 3 girls such that `B_1 and B_2` are not together in the group is ?

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