At college, 70% students studied Maths,75% students studied English,85% studied french and 80% studied german. What percentage at least must have studied all 4?

a)25% b)30% c)20% d)10% e)none of these

• students not studied the subjects 30% math, 25% english, 15% french, 20% german.
  30+25+15+20=90% it is the percentage that the students not common, the common are
  100-90=10
  
  answer will be = 10%
• 12 years agoHelpfull: Yes(59) No(11)
• Maths - 70%
  English - 75%
  French - 85%
  German - 80%
  
  So percentage of students who are studing all subjects will be:-
  Minimum of all 4 subjets(M,E,F,G)
  ie, 70 %
  
• 12 years agoHelpfull: Yes(5) No(43)
• none of these
• 9 years agoHelpfull: Yes(0) No(2)