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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 inclulded in the study?
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Answer / swapnil
n(r)=38
n(b)=20
n(r & b) = 13
n(r+b) = n(r)+n(b)-n(r&b)
= 38+20-13
= 45 (flags with either red or blue)
total flags(study) = 45 + 8(neither red nor blue) = 53
red not blue = 38-13 = 25
blue not red = 20-13 = 7
| Is This Answer Correct ? | 48 Yes | 1 No |
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