; 2009 line test Note: two-volume set of the relationship between the general solution of the problem general solution formula for the two sets
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2009 line test Note: two-volume set of the relationship between the general solution of the problem general solution formula for the two sets

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									2009 line test Note: the number of relations of the two collection issues Solution
Formula 2 set Solution

 two episodes of the problem solution formula

  【States 2006 Class -42】 existing 50 students to do physics, chemistry experiments,
physics experiments to do the right if there are 40 bottles of flute playing
Jesus     back scratch? 1, two kinds of experiments are wrong there are 4, then two
kinds of experiments were done on How many people
  A.27 people
  B.25 people
  C.19 people
  D.10 people
  is the math questions on the topic which often occurs " Two collections issues ",
such issues are generally easy to use principles of inclusion and exclusion, or simply
drawing can be solved. But the use of inclusion and exclusion principle on thinking
requires relatively high, while drawing more waste of time. Since such problems
generally have a similar model in accordance with out A common solution formula
given below, Xi Wang solving all of you can help:
  "meet Tiaojian one of the number of" + "to meet the conditions for the number two"
- "both to meet the number of" = "total number" - "neither satisfy the number of"
  for example on the question, should be incorporated into the formula is: 40 +31- x =
50-4 get x = 25.
  look at our other topics:
  2004A-46】 【State University, a class of students in a total of 32 people, at the first
examination, 26 were passed, in the second test in 24 pass, if the two tests, they did
not pass, and 4, then pass two exams are the number of how many
  A.22
  B.18
  C.28
  D.26
  substituted into the formula: 26 +24- x = 32-4, get x = 22
  Exercise:
  2004B-46】 【State University, a class of students in a total of 32 , at the first
examination, 26 were passed, in the second examination, 24 were passed, if the two
exams, 22 people have qualified, then the two tests did not pass the number of how
many
  A.10
  B.4
  C.6
  D.8
】 【Shandong 2004-14 there were 50 students in a class, in the first test, 26 people
were a perfect score in the second tests were out of 21 people. If the two tests did not
get the students out of 17 people, then get out of the two tests are the number of how
many?
 A.13 people
 B.14 people
 C. 17
 D.20 people
】 【Guangdong in 2005 under the -8 62 students will be fencing of 11 people, 56
people will swim the two will not have to use 4 , asked two students how many people
will?
 A.1 people
 B.5 people
 C.7 people
 D. 9 people
 【Guangdong 2006 at -11】 a club, will have 69 people playing chess, Chinese chess
will have 58, two chess are not under the 12 people, two chess who are under 30, ask
the club a total of How many people?
 A.109 people
 B.115 people
 C.127 people
 D.139 people
 social Admission 2007-18】 【Beijing TV to 100 investigate the situation of people
watching TV yesterday, 62 people read the two channels, 34 had seen the 8-channel,
11 people have seen the two channels. Asked the two channels have not seen how
many people?
 A.4
 B.15
 C.17
 D.28
 【Shandong 2003 - 12】 a car park 50 cars, red cars 35, Xiali sedan 28, a 8 is not a
red car are not Xiali car, and asked how much parking a red Xiali sedan cars?
 A.14
 B.21
 C.15
 D.22
 country 2004B-46】 【B】 【resolution 26 +24-22 = 32-x => x = 4
 Shandong 2004-14】 【B】 【resolution 26 +21- x = 50-17 => x = 14
】 【Guangdong in 2005 under the -8 D 【】 11 +56- x resolution = 62-4 =>
x=9
 at -11】 【Canton A 2006 analysis】 【69 +58-30 = x-12 => x = 109
】 【Beijing Social strokes 2007-18 Analysis】 【B 62 +34-11 = 100-x => x
= 15
 【B】 【Shandong 2003-12 Analysis】 35 +28- x = 50-8 => x = 21
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