4. Six years ago mean age of a family was 100 years. What is the
present mean age of the family?
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Answered by
1
Answer:
106
Step-by-step explanation:
6 years ago mean age =100
age =x y z
(x+y+z)/3=100
present age
{(x+6)+(y+6)+(z+6)}/3=
(x+y+z)+(3×6)/3=
(300+18)/3=
318/3=
106
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