GRE Exam Numerical Ability Arithmetic

List L: 2, x y
List M: 1, 2, 3, x, y
If the average (arithmetic mean) of the 3 numbers in list L is 10 3 , what is the average of the 5 numbers in list M ? Give your answer as a fraction

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GRE Other Question

Which of the following inequalities have at least one positive solution and at least one negative solution? Indicate all such inequalities.
(A) 5/3 x < x
(B) x^3 < x
(C) x - 6 < x – 7 A business owner obtained a $6,000 loan at a simple annual interest rate of r percent in order to purchase a computer. After one year, the owner made a single payment of $6,840 to repay the loan, including the interest. What is the value of r ?
(A) 7.0
(B) 8.4
(C) 12.3
(D) 14.0
(E) 16.8