The monthly income of 15 families is as follows.Find out the median income of families.(
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Step-by-step explanation:
X and Y can do 1⁄12th of work in 1 day
Y and Z can do 1⁄15th of work in 1 day
Z and X can do 1⁄20th of work in 1 day
Adding the above
= > (X + Y) + (Y +Z) + (Z + X) = 1⁄12 + 1⁄15 + 1⁄20
= > 2(X +Y +Z) = (5 + 4 + 3)/60
= > X + Y + Z = 1/10
Therefore working together X, Y and Z can complete the work in 10 days.
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