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The average age of 18 persons was decreased by 4 months. when two of them of age was 32 years and 48 years were replaced by two new person whose difference in the age of 4 years. Find the age of each new person. |
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Answer» Initial average age=A years. Final average years=(A-1/3)years. A=(Sum of ages of 16 personc+32+48)/18 Sum of ages of 16 persons=18A-80 age of first person=x age of second person=x+4 Final average age=A-1/3=18A-80+2x+4 18A-6=18A-80+2x+4 x=35 Ages are=35,39 years. |
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