In the Sareen family each daughter has the same numbers of
brother as she sisters and each son has twice as many sisters as he has
brothers. Now can you tell me how many sons and how many daughters does the
Sareen family have?
Answer: 4 daughters and 3 sons. Consider d= number of
daughters, and s = number of sons then
D-1 = s
2(s-1) = d
Solving d and s,
D = 4, s =3
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