If the average of 20 digits is 500 and the average of 14 of them is 390, calculate the average of the remaining 6 numbers? Choose the correct option:  A) 756.7  B) 751.7  C) 753.7  D) 752.7  E) 722.7

Rationale: "explanation : total of the 20 digits - 20 * 500 = 10000 total of the 14 digits - 14 * 390 = 5460 total of the remaining 6 digits - 10000 - 5460 = 4540 average of the remaining 6 numbers = 4540 / 6 = 756.7 answer : a"
Answer: A