Each of a group of 20 students studies at least one of the three subjects Chemistry, Physics, and Biology. All those who study Physics also study Chemistry. 3 study all three subjects, 4 study only Chemistry, 8 study Physics and 14 study Chemistry (a) Draw a Venn diagram to illustrate this information. (b) How many students study the only Biology? (c) How many students study Chemistry and Biology but not Physics?
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I think you are in 10th right.
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De Morgan’s First Law states that the complement of the union of two sets is the intersection of their complements. Whereas De Morgan’s second law states that the complement of the intersection of two sets is the union of their complements. These two laws are called De Morgan’s Law. De Morgan’s first law can be expressed as (AUB)’ = A’∩B’. In set theory, these laws relate the intersection and union of sets by complements. In this article, we will learn De Morgan’s first law statement and proof with many solved examples in detail.
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