Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is:

Among three numbers, the first is twice the second and thrice the thir

1.	Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is:
A.	39.5
B.	41.5
C.	54
D.	28
Answer» D. 28

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Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is:

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