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):
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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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