1.In a survey of 300 people, it was found that 150 people liked I-phone and 200 people like Android phone. But 25 people did not like any of these two phones.
a.। If I and A denote the sets of people who like I-phone and Android Phone respectively, write the cardinality of n(IUA).
b.Present the above information in a Venn-diagram.
c.Find the number of people who liked I-phone only.
d.Compare the number of people who like both I-phone and Android phone and who do not like any of these two phones. ​