Question

30.In English exam, the average of Class “A”
was found to be "x" marks. After deducting a
'computational error, the average marks of
100 candidates got reduced from 74 to 54
The average thus came down by 25 marks.
The total numbers of candidates who took the
English exam were?
(A) 50
(B) 20
(C) 80
(D) 70

Answer 1

Answer:

80

Step-by-step explanation:

Let say Total Students were = S

and average Marks = A

Total Marks = SA

the average marks of 100 candidates got reduced from 74 to 54

Reduction in total = 100 * (74 - 54) = 2000

average came down by 25 marks => Total Marks reduces = 25S

25S = 2000

=> S = 80

The total numbers of candidates who took the English exam were = 80

( Question data is not correct as if total students were 80 only , how 100 students avergae can be reduced)