Ninety coffee drinkers were asked whether they used cream or sugar in their coffee. The summary of the survey was as follows:
59 use sugar 42 use cream 19 use both
a. How many used sugar but not cream?
b. How many used cream but not sugar?
c. How many used cream or sugar
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Answers & Comments
Answer:
a.78
b.61
c.120
Step-by-step explanation:
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