Question

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

Answer 1

Step-by-step explanation:

Given 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

• Let hindu be h and deccan chronicle be d
• So we know that n(A U B) = n(A) + n(B)
•                           n(h U d) = n(h) + n(d)
•                               40 = 25 + n(h)
• So n(h) = 40 – 25
•            = 15    

So the number of apartments that buy only the hindu will be 15.