The average income of A B and C is Rs 12…

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The average income of A, B and C is Rs. 12,000 per month and average income of B, C and D is Rs. 15,000 per month. If the average salary of D be twice that of A, then the average salary of B and C is in Rs. :

  1. A. 8,000
  2. B. 18,000
  3. C. 13,500
  4. D. 9,000

Answer: Option C

Here is complete explanation of The average income of A B and C is Rs 12….

Solution(By ExamCraze Team)

$$eqalign{ & A + B + C = 12000 times 3 cr & B + C + D = 15000 times 3 cr & to D - A = 3000 times 3 = 9000 cr & {text{Also}},,D = 2A cr & {text{Then}},,D = 18000,{text{and}},A = 9000 cr & {text{Therefore}}, cr & {text{Average}},{text{salary}},{text{of}},B,{text{and}},C, cr & = frac{{ {45000 - 18000} }}{2} cr & = 13500 cr} $$

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