Question 33
Riaz distributes 20 copies of The Hindu and 25 copies of Deccan Chronicle in an apartment building that has 40 apartments. If he distributes at least one newspaper to each apartment, the number of apartments that buy only The Hindu is
Solution
Let a = Apartments where only Hindu was distributed
b = Apartments where the only DC was distributed
c= both
a+c = 20
b+c = 25
a+b+c = 40
=> b= 20,a=15 and c= 5
Only hindu =15
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