Of 20 labourers if the average monthly earnings of 12 be Rs. 10.15 P. and if each of the rest earns Rs. 8 per month, find the average montly earnings of the 20 labourers.
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Answer:
12×10.15= 121.8 = total income of 12
Remaining is 8
Total income of remaining = 8×8 = 64
Therefore total income of 20 persons =
121.8 + 64 = 185.8
Therefore average monthly income of 20 labourers = 185.8÷20 = 9.29
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