The average monthly income of X and Y is Rs.5050. The average monthly income of Y and Z is Rs.6250 and the average monthly income of X and Z is Rs.5200. The monthly income of X is :
Options:
A . Rs.5000
B . Rs.4000
C . Rs.3500
D . Rs.4050
Answer: Option B Answer: (b)X + Y =Rs.(2 × 5050) =Rs.10100 Y + Z =Rs.(2 × 6250) =Rs.12500 z + x =Rs.(2 × 5200) =Rs.10400 Adding all three, 2 (X + Y + Z) =Rs.(10100 + 12500 + 10400) =Rs.33000 ⇒ X + Y + Z = Rs.16500 ∴ X = (X + Y + Z) – (Y + Z) =Rs.(16500 – 12500) =Rs.4000
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