Of the three numbers, the first number is twice of the second and the second is thrice of the third number. If the average of these 3 numbers is 20, then the sum of the largest and smallest numbers is

Of the three numbers, the first number is twice of the second and the

1.	Of the three numbers, the first number is twice of the second and the second is thrice of the third number. If the average of these 3 numbers is 20, then the sum of the largest and smallest numbers is
A.	24
B.	42
C.	54
D.	60
Answer» C. 54

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