DecentNabeel
  • DecentNabeel
please help me
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what is the question
DecentNabeel
  • DecentNabeel
Consider multiple people in a band 10 play the flute 11 play the recorder 14 player the guitar 3 play all the instrument 20 player only one instrument how many play exactly 2 instrument
DecentNabeel
  • DecentNabeel
@beastieman21

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anonymous
  • anonymous
@nincompoop
MrNood
  • MrNood
|dw:1439658080442:dw| start here
MrNood
  • MrNood
you need 11 more guitars 7 more flutes 8 more recorders total 26 - but only 20 of those fit in one of the the 'single instrument' categories
DecentNabeel
  • DecentNabeel
mean 6 is the answer .. @MrNood
DecentNabeel
  • DecentNabeel
@ganeshie8 @Miracrown
ganeshie8
  • ganeshie8
|dw:1439714394819:dw|
ganeshie8
  • ganeshie8
You're given : ``` a+b+d+3 = 10 a+c+e+3 = 11 b+c+f+3 = 14 d+e+f = 20 ``` and you need to find out `a+b+c`
ganeshie8
  • ganeshie8
Easy, add up the first 3 equations : a+b+d+3 = 10 a+c+e+3 = 11 b+c+f+3 = 14 --------------------- 2(a+b+c) + d+e+f + 9 = 35 2(a+b+c) + d+e+f = 26 2(a+b+c) + 20 = 26 2(a+b+c) = 6 a+b+c = 3

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