Description
A survey of 900 subscribers to the Los Angeles Times revealed that 700 people subscribe to the daily morning edition and 400 subscribe to both the daily and the Sunday editions.How many subscribe to the Sunday edition?
A. | ||
B. | ||
C. | ||
D. | ||
E. | ||
F. |
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Explanation & Answer
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P(A)=People subscribing daily morning edition
P(B)=People subscribing the Sunday editions
P(AUB)=P(A)+P(B)-P(A Both B) ...........(1)
Given that P(AUB)=900; P(A)=700;and P(A both B)=400
From equation(1), we have
900=700+P(B)-400 ; P(B)=600
Thus People subscribing the sunday edition P(B) is 600.
Answer is "C"
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