the average age of a, b, c, d and e is 40 years if the age average age of a and b is 35 and that c and d is 42 then the age of e is
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age of e is 46 years
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a + b + c + d + e = 40*5=200
a + b + c + d = 2*35 + 2*42 = 154
Age of e = 200 - 154 = 46 years
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