The average monthly income of A and B is Rs. 5050. The average monthly income of
B and C is Rs. 6250 and the average monthly income of A and C is Rs. 5200.
What is the monthly income of A?
Let the monthly income of A = a
monthly income of B = b
monthly income of C = a
a+b=2×5050−−−−−−−−−(Equation1)
b+c=2×6250−−−−−−−−−(Equation2)
a+c=2×5200−−−−−−−−−(Equation3)
(Equation 1) + (Equation 3) - (Equation 2)
=>a+b+a+c−(b+c)=(2×5050)+(2×5200)−(2×6250)
=> 2a = 2(5050 + 5200 - 6250)
=> a = 4000
=> Monthly income of A = 4000
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