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In a survey of 50 newspaper readers, 40 read Champion and 30 read Guardian, how...

Mathematics
JAMB 2010

In a survey of 50 newspaper readers, 40 read Champion and 30 read Guardian, how many read both papers?

  • A. 10
  • B. 5
  • C. 15
  • D. 20
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Correct Answer: Option D
Explanation

Let C n G = X
n C only = 40 - x
n G only = 30 - x
40 - X + 30 - X + X  = 50
70 - X = 50
X = 70 - 50
X = 20

There is an explanation video available below.

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Explanation Video

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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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