How many numbers can be formed fromed from the digits 1, 2, 3, 5,7, 9 so that no two girls are together

Abinash Pradhan's image
Abinash Pradhan
July 30, 2019, 11:50 p.m.

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Abinash Pradhan
July 30, 2019, 11:51 p.m.

7!×8p5

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