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[" The number of ways in which "15" boys...

[" The number of ways in which "15" boys and "2" girls can sit in a row such that between the giris at "],[" boys sit is: "],[[" (a) "171-(121times3!)," (b) "171-(sqrt(2)c,times31)," (c) "171-(2^(2)c_(3)times15!)," (d) "171-(9times21times15!)]]

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