If a team consists 20 members in which 20% are mathematician, then how many members should they hire so that the ratio would become 10/11.

• If a team consists 20 members in which 20% are mathematician then there are 4 mathematicians.
  
  If x mathematicians are hired so that the ratio would become 10/11, then
  (4+x)/(20+x) = 10/11
  11*(4+x) = 10*(20+x)
  44+11x = 200+ 10x
  x= 200-44= 156
  
  To check now ratio is (156+4)/20+156 = 160/176 = 10/11
  
• 12 years agoHelpfull: Yes(66) No(5)
• the ans is 156
  
  so there are 4 mathematicians out of 20
  and 4+x/20+x=10/11
  11*(4+x) = 10*(20+x)
  44+11x = 200+ 10x
  x= 200-44
  x= 156
• 7 years agoHelpfull: Yes(1) No(0)