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Math, 28.10.2019 17:29 elaineeee

Asurvey made by a fast food chain last month showed that of the 1000 respondents, 500 had been to mcdonald's 700 to jollibee 450 to wendys 302 mcdonald's and jollibee 250 to jollibee and wendy's 220 to mcdonald & wendy's and 100 to all three dot how many went open to (a) wendy's but not d two other two?
(b) only one of them?
and
(c) none of these three? ​

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