In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons are there in the family ?

A. 2 B. 3
C. 4 D. 5

• 4 gals 3 boys
• 12 years agoHelpfull: Yes(2) No(2)
• Assume the family has X girls and Y boys, according to the question,
  we can come up with 2 equations:
  X-1=Y, 2(Y-2)=X.
  Solve the equations, we get X=4, Y=3.
• 10 years agoHelpfull: Yes(2) No(2)
• X-1=Y, 2(Y-2)=X.
  Solve the equations, we get X=4, Y=3.
  
• 10 years agoHelpfull: Yes(0) No(1)