Project ForgeGeneral Aptitude
Analytical Aptitude
GATE 2020
Medium
P, Q, R and S are to be uniquely coded using alpha and beta. If P is coded as alpha-alpha and Q as alpha-beta, then R and S, respectively, can be coded as _____.
- Abeta-alpha and alpha-beta
- Bbeta-beta and alpha-alpha
- Calpha-beta and beta-beta
- beta-alpha and beta-beta
Explanation
With two symbols and 2-letter codes, exactly 4 unique combinations exist: alpha-alpha, alpha-beta, beta-alpha, beta-beta. P and Q already use alpha-alpha and alpha-beta, so the only two codes left for R and S are beta-alpha and beta-beta.
Source: GATE ME 2020 Session 1 (ME-1) (2020)
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