70 students are required to paint a picture. 52 use green color and some children use red, 38 students use both the colors. How many students use red color?

• 70 = red +green -both
  Red = 70-green+both = 70-52+38=56
• 13 years agoHelpfull: Yes(46) No(1)
• 52-38=14---uses only green color
  70-52=18---uses only red color
  38 students uses both colo
  38+18=56 uses red color
• 13 years agoHelpfull: Yes(14) No(4)
• 52-38=14---uses only green color
  70-52=18---uses only red color
  38 students uses both color
  38+18=56 uses red color
• 13 years agoHelpfull: Yes(6) No(2)
• 56 use red color.
  since
  70 = 52 + x - 38
  or, x = 56
• 13 years agoHelpfull: Yes(5) No(0)
• it s more easy if u apply venn diagram
  
  sol :--- 38 = r+g.,, g =52... therefore only g=52-38=14 so red = only red + (red +green) = total - only green== 70-14=56 use red color.. :) :P
• 13 years agoHelpfull: Yes(3) No(0)
• u= p(green)+p(red)-p(green ^red); p(red)=70+38-52=56;
• 13 years agoHelpfull: Yes(2) No(0)
• 18+38=56 used red
• 13 years agoHelpfull: Yes(2) No(0)
• n(A U B) = n(A) + n(B) - n(A instersection B)
  
  n(A U B)=70
  n(A)= 52
  n(A instersection B) = 38
  n(B)= ?
  
  70=52+x-38
  x=56
• 9 years agoHelpfull: Yes(1) No(0)
• it can be solved by using the simple probability formula
  P(AUB)=P(A)+P(B)-P(A^B)
  52+x-38=70
  x=56
• 9 years agoHelpfull: Yes(1) No(0)
• 70 = 52 + x - 38
  x = 56 ans
  
• 8 years agoHelpfull: Yes(1) No(0)
• total 72
  52 using green color
  38 both color
  so 72-((52-38)+38)=20
• 13 years agoHelpfull: Yes(0) No(4)
• 18
  70-52=18
• 8 years agoHelpfull: Yes(0) No(6)
• 18 students
  
• 7 years agoHelpfull: Yes(0) No(1)
• answer is 56.
  70-52+38=56 children uses red color out of 70
• 6 years agoHelpfull: Yes(0) No(0)
• n(G)+n(R)-n(G+R)
• 6 years agoHelpfull: Yes(0) No(0)
• (52+x)/2=38
  52+x=76
  x=24
• 4 years agoHelpfull: Yes(0) No(0)
• A=52
  b=38
  and p(aub)=70
  i.e by formula
  p(AUB)=P(A)+p(b)-P(AUB)
  =70-52+38
  =56
• 4 years agoHelpfull: Yes(0) No(0)
• Total student = red+green-both
  70 = x +52 -38
  x=56
  Therefore, 56 use red colour
• 5 Months agoHelpfull: Yes(0) No(0)