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In 2013, the arithmetic mean of the annual incomes of Mukesh and Anil was Rs. 3800.
The arithmetic mean of the annual incomes of Anil and Ratan was Rs. 4800, and the arithmetic mean of the annual incomes of Ratan and Mukesh was Rs. 5800.
What is the arithmetic mean of the incomes of the three?
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- Rs. 48000
If the annual incomes of Mukesh, Anil and Ratan are M , A and R respectively, then
Given, (M+A)/2 =3800, M + A= 7600 ---(i)
(A+R)/2 =4800, A + R= 9600 ---(ii) &
(R+M)/2 = 5800, R + M= 11600 ---(iii)
On solving (i), (ii) & (iii), M=4800, A=2800 & R=6800
So arithmetic mean of incomes of the three =(4800+2800+6800)/3 =4800 - 9 years agoHelpfull: Yes(0) No(0)
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