Question

in an examination, 65% students passed in civics and 60% in history, 40% passed in both of these subjects. if 90 students failed in history and civics both, then what is the total number of students?

Answer 1

65%+60%+40%=165% 165x90/100=1485/10 148.5

Answer 2

Answer:

Step-by-step explanation:

civics passed= 65------(65-40=25)

history passed=60-----(60-40=20)

both passed = 40

both failed = 100 - (25+20+40)

                  = 100 - 85

                  = 15

  if 15----------------90

     100-------------600

so answer should be 600