Question
P, Q, R and S are to be uniquely coded using α and β. If P is coded as αα and Q as αβ, then R and S, respectively, can be coded as ________.
Options :
βα and ββ
αβ and ββ
αβ and ββ
ββ and αα
Answer :
βα and ββ
Solution :
All different possible codes using α and β are :
αβ, βα, αα, ββ
Given :
P is coded as αα
Q is coded as αβ
∴ R and S can be coded as βα and ββ respectively.
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