In a class of 100 students 50 students passed in Mathematics and 70 passed in English, 5 students failed in both Mathematics and English. How many students passed in both the subjects?

• N(A) = 50, N(E) = 70, N(AUB) = 100-5 =95,
  N(ANB) = N(A)+N(B)-N(AUB) = 50 + 70 - 95 = 25
• 5 years agoHelpfull: Yes(1) No(0)
• p(a U b)=p(a)+p(b)-p(a common b)
  p(a common b)=20
  so both passed=20-5-15
• 8 years agoHelpfull: Yes(0) No(2)