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For every person who actually has the flu there are 6 people who have the flu resulting in a cold. If a doctor sees 49 patients write and solve a proportion to determine how many of these you would expect to have a cold

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For every 1 person that has the flu, 6 have a cold.  That totals 7 people who are ill.

If the doctor sees 49 patients then 1 in 7 have the flu (7) and 6 in 7 have a cold (42)

1 : 6 => 7 : 42

 
49 divided by 6 equals 8 remainder one

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