anonymous
  • anonymous
in a group of 100 students, 40 take physics, 60 take sociology and 80 take music. 7 students take physics and sociology, 46 students take sociology and music and 36 students take physics and music. If 6 students take all 3 courses, how many student take none of the courses?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
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princeharryyy
  • princeharryyy
that's wrong
anonymous
  • anonymous
its right

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anonymous
  • anonymous
no it's not wtf go away
princeharryyy
  • princeharryyy
|dw:1434748810143:dw|
anonymous
  • anonymous
the answer is 3
princeharryyy
  • princeharryyy
let me check it out again.
princeharryyy
  • princeharryyy
i wrote one of the figure wrong.
princeharryyy
  • princeharryyy
g =6; g + e =7; g+f = 46; d+g = 36 => e=1 f=39 d=30 a =40-(e+g+d) = 40 -(1+6+30) = 3 b =60-(e+g+f) = 60 -(1+6+39) = 14 c =80-(f+g+d) = 80 -(39+6+30) = 5 a+b+c+d+e+f+g+x = 100 3+14+5+30+1+39+6+x = 100 x =100- 98 =2
princeharryyy
  • princeharryyy
the final answer @yomamabf I hope you'll get it
princeharryyy
  • princeharryyy
u are not watching closely I guess! i still did something wrong.
princeharryyy
  • princeharryyy
I calculated f wrong that means f = 40, b= 13 and c= 4 which makes the answer that is x 3 rather than 2. So, yes you are right.
princeharryyy
  • princeharryyy
anonymous
  • anonymous
i got it
anonymous
  • anonymous
thanks
princeharryyy
  • princeharryyy
you know what I was trying to say when I said you were wrong @yomamabf

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