Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 49.50, then what is the difference between the first and the third number? Choose the correct choice from the following answers
A) 28	B) 54	C) 39.5	D) 41.5	E) None of these
6x, 3x, 2x.   Now average = 6x+3x+2x/9 = 39.5   On solving we get the difference in between first and the third number = 54.   Answer:54.
<result>B</result>
Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 49.50, then what is the difference between the first and the third number?