the average marks of 10 students in a class is 100 . but a student mark is wrongly noted as 90 instead of 10 then find the correct average marks ?
"correct avg marks = 100 + ( 10 - 90 ) / 10 avg = 100 - 8 = 92 answer is c"
divide(add(subtract(multiply(100, 10), 90), 10), 10)