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anonymous

  • one year ago

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?

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  1. anonymous
    • one year ago
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    |dw:1434748502318:dw|

  2. princeharryyy
    • one year ago
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    that's wrong

  3. anonymous
    • one year ago
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    its right

  4. anonymous
    • one year ago
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    no it's not wtf go away

  5. princeharryyy
    • one year ago
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    |dw:1434748810143:dw|

  6. anonymous
    • one year ago
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    the answer is 3

  7. princeharryyy
    • one year ago
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    let me check it out again.

  8. princeharryyy
    • one year ago
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    i wrote one of the figure wrong.

  9. princeharryyy
    • one year ago
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    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

  10. princeharryyy
    • one year ago
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    the final answer @yomamabf I hope you'll get it

  11. princeharryyy
    • one year ago
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    u are not watching closely I guess! i still did something wrong.

  12. princeharryyy
    • one year ago
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    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.

  13. princeharryyy
    • one year ago
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    @yomamabf

  14. anonymous
    • one year ago
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    i got it

  15. anonymous
    • one year ago
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    thanks

  16. princeharryyy
    • one year ago
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    you know what I was trying to say when I said you were wrong @yomamabf

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