1. In a class, 30 offer Biology, 21 offer Chemistry and 22 offer Physics. 15 offer
Physics and Biology, 10 offer Physics
and Chemistry and 13 offer Biology and
Chemistry. 2 offer Physics only, 3 offer
Chemistry only and 7 offer Biology
only.
i) Illustrate this information in a Venn
diagram
ii) Find the number of students:
a) who offer all the three subjects.
b) in the class.
iii) If a student is selected at random,
what is the probability that he
studies either Physics or
Chemistry?​