A family I know has several children. Each boy in this family has as many sisters as brothers but each girl has twice as many brothers as sisters. How many brothers and sisters are there?

• answer:4 brothers and 3 sisters
  let no. of girls=g n boys=b
  b=g+1 ..........(i) as each boy have equal no. of sisters and brothers and he is not included in brothers.so,1 is for him in g+1.
  now ,
  b=2(g-1)........(ii) as each girl have g-1 sisters.
  solving (i) and(ii) we get g=3 and b=4
  
• 13 years agoHelpfull: Yes(78) No(8)
• We can easly obtain solution by imagining that boys are 4.
  Then each boy will have 3 bros and 3 sis.
  While each girl will have 2 sis and 4 bros that is twice of girl.
• 13 years agoHelpfull: Yes(22) No(19)
• 4 brothers, 3 Sisters
• 9 years agoHelpfull: Yes(5) No(5)
• 4 brothers, 3 Sisters
• 9 years agoHelpfull: Yes(3) No(1)
• b=s+b
  g=2b+s
  Adding (b+g)
  b+g=s+b+2b+s
  =2s+3b
  Adding that each boy and girl
  so answer is
  3s+4b
  =
• 5 years agoHelpfull: Yes(2) No(0)
• Brothers-4,sisters-3 total-7
• 9 years agoHelpfull: Yes(0) No(0)
• 4 boys ,3 girls
• 9 years agoHelpfull: Yes(0) No(1)
• 4 brothers and 3 sisters ,try on your own based on given conditions
• 9 years agoHelpfull: Yes(0) No(1)
• how can it is possible whether it is not given any particular number of children
• 7 years agoHelpfull: Yes(0) No(1)
• answer:4 brother and 3 sister
  for each boy has 3 bro and 3 sis , for girl has 2 sis and 4 bro so condition satisfied
• 6 years agoHelpfull: Yes(0) No(0)