i) QPR=30 no info about other angles other than 90^o one. 30, 30, 120; 30, 60 and 90 or 30, 15, 135; 45, 45, 90 - INSUFF
ii) we have both options 30, 30, 120; 30, 60 and 90 or 30, 15, 135; 45, 45, 90 -INSUFF
Together no improvement
So E
DS 7
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Source: Beat The GMAT — Data Sufficiency |


















