Mathematics, 29.06.2021 04:00 yesmi

There are 40pupils in a class. 30 of them study Biology, 22 study Physics and 21 study chemistry,15 study physics and Biology, 10 study Physics and chemistry, 13 study biology and chemistry, 2 study physics only, 3 study chemistry only and 7 study biology only. Represent this information on a Venn diagram.
How many pupils study all the subject.
If a student is selected at random, what is the probability that he studies either physics or chemistry.

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There are 40pupils in a class. 30 of them study Biology, 22 study Physics and 21 study chemistry,15...

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