## 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?

1. anonymous

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2. princeharryyy

that's wrong

3. anonymous

its right

4. anonymous

no it's not wtf go away

5. princeharryyy

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6. anonymous

7. princeharryyy

let me check it out again.

8. princeharryyy

i wrote one of the figure wrong.

9. 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

10. princeharryyy

the final answer @yomamabf I hope you'll get it

11. princeharryyy

u are not watching closely I guess! i still did something wrong.

12. 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.

13. princeharryyy

@yomamabf

14. anonymous

i got it

15. anonymous

thanks

16. princeharryyy

you know what I was trying to say when I said you were wrong @yomamabf