On a test average (arithmetic mean) test score for 9 students is 80. What must be 10th student's score that average score for 10 students to be 82?	Select the correct option:
A) 100
B) 90
C) 80
D) 70
E) 60
(9*80+x)/10=82   x=(10*82)-(9*80)   x= 820 - 720= 
<gadget id="calculator">820 - 720</gadget>
<output>100</output>
100   Correct answer is 100
<result>A</result>
On a test average (arithmetic mean) test score for 9 students is 80. What must be 10th student's score that average score for 10 students to be 82?