Robin's average (arithmetic mean) test score on 9 tests is 82. What must be Robin's score on a 10th test for his average score on the 10 tests to be 83? Choose the correct choice from the following answers
A) 92 B) 82 C) 72 D) 62 E) 52
(9*82+x)/10=83   x=(10*83)-(9*82)   x= 830 - 738= 
<gadget id="calculator">830 - 738</gadget>
<output>92</output>
92   Correct answer is 92
<result>A</result>
Robin's average (arithmetic mean) test score on 9 tests is 82. What must be Robin's score on a 10th test for his average score on the 10 tests to be 83?