The average age of A,B,C,D and E is 40 years.The average age of A and B is 35 years and the average age of C and D is 42 years .The age of E is

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Age E = ( A + B + C + D + E ) - [ ( A + B ) + ( C + D ) ] = ( 40 x 5 ) - [ ( 35 x 2 ) + ( 42 x 2 )] =200 - ( 70 + 84) = 200 - 154 = 46

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