the average marks of 20 students in a class is 100. but a student mark is wrongly noted as 50 instead of 10 then find the correct average marks?  Choices
A) 78 B) 82 C) 98 D) 91 E) 85
<gadget id="calculator">100 * 20</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 - 50</gadget>
<output>1_950</output>

<gadget id="calculator">1_950 + 10</gadget>
<output>1_960</output>

<gadget id="calculator">1_960 / 20</gadget>
<output>98</output>

<result>C</result>
the average marks of 20 students in a class is 100. but a student mark is wrongly noted as 50 instead of 10 then find the correct average marks?
divide(add(subtract(multiply(100, 20), 50), 10), 20)
"correct avg marks = 100 + ( 10 - 50 ) / 20 avg = 100 - 2 = 98 answer is c"