SOLUTION: Out of a class of 36 children ,17have younger brothers and sisters. Aporoximately what proportion is this?

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Question 888739: Out of a class of 36 children ,17have younger brothers and sisters. Aporoximately what proportion is this?
Answer by Theo(13342) About Me  (Show Source):
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the ratio of children who have younger brothers and sisters to the total class is 17/36.

the ratio of children who have younger brothers and sisters to children who do not have younger brothers and sisters is equal to 17 / (36 - 17) = 17 / 19.