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Initial ratio 

     Men : Women

      5       :  9   

x 3

    15     : 27

1/3 of men leave, so 5U of men leave, remaining is 10U

2/9 of women leave, so (2/9) x 27 = 6U leave, remaining is 21U

Total units remaining = 10 + 21 = 31U. 

31U = 5270, 1U = 170. 

At start there were 15 + 27 = 42U. 42 x 170 = 7140

 

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