College T has 1000 students. Of the 200 students majoring in one or more of the sciences,130 are majoring in Chemistry and 150 are majoring in Biology. If at least 30 of the students are not majoring in either Chemistry or Biology, then the number of students majoring in both Chemistry and Biology could be any number from

• 200 students r frm science.
  30 are nt major in chem or bio.. so 200-30=170 hav taken either chem or bio or both....
  no of students takn both chem and bio=130+150-170=110
  atleast 30 at d max itccould b 50.. becoz 150students takn bio..
  so ans is 110-130
• 11 years agoHelpfull: Yes(24) No(0)
• total=200
  neither>=30
  chemistry=130
  bio=130
  
  maximum common=minimum of the two=130
  
  if neither=30
  then common=150+130+30-200=110
  
  hence the range is 110 to 130
• 12 years agoHelpfull: Yes(12) No(14)
• no of students majoring in science = 200
  no of students in chemistry =130
  no of students in biology =150
  no of students not in chemistry or biology =30
  no of students in science = 200 -30= 170
  so no o f students in both chem and bio = 180 -170 = 10..
• 11 years agoHelpfull: Yes(2) No(12)
• 200 students r frm science.
  30 are nt major in chem or bio.. so 200-30=170 hav taken either chem or bio or both....
  no of students takn both chem and bio=130+150-170=110
  atleast 30 at d max itccould b 50.. becoz 150students takn bio..
  so ans is 110-130
• 4 years agoHelpfull: Yes(1) No(0)
• no
  answer is 105
• 4 years agoHelpfull: Yes(0) No(1)