Oshkosh did a study of the colors used in African national flags. He found that 38 flags have red, 20 have blue, 13 have both red and blue, and 8 have neither red nor blue. How many flags A. have red but not blue? B. have blue but not red? C. were included in the study?
25, 7, 53
38, 20, 79
25, 7, 66
30, 20, 60

• as given total no of flag red= 38 blue=20 and both color=13 and neither red and nor blue=8
  
  
  so if subtract both colors flag from red than only pure red color flag = 25
  
  and if we subtract both color flag from blue color flag than pure blue color flag=7
  
  and than total flag= red +blue + both color+ neither red nor blue flag
  
  so the total flag is = 25+7+13+8
  = 53
• 10 years agoHelpfull: Yes(34) No(4)
• RED=38
  BLUE=20
  OTHER THAN RED AND BLUE =8
  RED AND BLUE COMMON= 13
  C)TOTAL NO. OF FLAGS=38+20+8-13
  53.
  A) RED BUT NOT BLUE=38-13
  25.
  B) BLUE BUT NOT RED=20-13
  7.
  25,7,53
  
  
• 10 years agoHelpfull: Yes(12) No(1)
• 25,7,53
  
  R=38
  B=20
  R&B=13
  
  Only R = R-R&B = 38-13 = 25
  Only B = B-R&B = 20-13 = 7
  Total = onlyR +onlyB + R&B + none = 25+7+13+8 = 53
• 10 years agoHelpfull: Yes(4) No(1)
• ans.25, 7, 53
  Only red=38-13=25
  Only blue=20-13=7
  Total=25+7+13+8=53
• 10 years agoHelpfull: Yes(1) No(1)
• 38-13=25
  20-13=7
  25+13+7+8=53
• 10 years agoHelpfull: Yes(1) No(1)
• 25,7,53 is correct
• 10 years agoHelpfull: Yes(1) No(1)
• taking 2 sets of flags;red & blue and their intersectn.
  intrsectn has 13 7total flags wid red color r 38,so flags dat r nly red=25
  similarly flags dat r nly blue=20-13=7
  considering the universal set apart from blue n red flag=8 so no of flags included in stdy=25+13+7+8=53.
• 10 years agoHelpfull: Yes(1) No(1)