SOLUTION: The average price monthly salary of A,B and C is Rs.600 and that of B,Cand D is Rs 750.if D,s salary is Rs 900 a month,find A,s monthly salary?

Question 1043610: The average price monthly salary of A,B and C is Rs.600 and that of B,Cand D is Rs 750.if D,s salary is Rs 900 a month,find A,s monthly salary?
Answer by ikleyn(52814) (Show Source): You can put this solution on YOUR website!
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The average price monthly salary of A, B and C is Rs.600 and that of B, C and D is Rs 750.
If D's salary is Rs 900 a month, find A's monthly salary?
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You are given

 = 600,   (1)  (first condition)
 = 750.   (2)  (second condition).

It is equivalent to

A + B + C     = 1800,  (3)
    B + C + D = 2250.  (4)

Distract (3) from (4). You will get

D - A = 450.

Then A = D - 450.

But we are given that D = 900.

Hence, A = 900 - 450 = 450.

Answer.   A's salary is Rs 450.

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