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Out of 400 students in the final year secondary school, 300 are offering biology and...

Out of 400 students in the final year secondary school, 300 are offering biology and 190 are offering chemistry
a.how many students are offering both biology and chemistry?
b.how many are offering atleast one of biology and chemistry?

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WAEC past questions - Download mobile app to study anywhere - Prepare for JAMB too, all in one app
JAMB CBT Software 2023 - Free Download
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