A mathematics teacher tabulated the marks secured by 35 students of 8th class. The average of their marks was 72. If the marks secured by reema was written as 36 instead of 86 then find the correct average marks upto two decimal places.
Answers
Answer:
73.42
Step-by-step explanation:
Number of students in Class = 35
∴ Average Marks = Sum of Marks Scored by all students / Number of students
Average given = 72
∴ Sum ( Marks of 35 Students) / 35 = 72
Sum ( Marks of 35 Students) = 72 × 35
Sum ( Marks of 35 Students) = 2520
As Reema's Marks were written 36 instead of 86 therefore to make the sum of marks correct we will have to add Reema's remaining marks (86 - 36 =50 ) to the earlier sum of student's marks.
∴ Correct Sum of Student's Marks = 2520 + 50
= 2570
Now Correct Average Marks = 2570/35
= 73.42
Answer:
Step-by-step explanation:y
Number of students in Class = 35
∴ Average Marks = Sum of Marks Scored by all students / Number of students
Average given = 72
∴ Sum ( Marks of 35 Students) / 35 = 72
Sum ( Marks of 35 Students) = 72 × 35
Sum ( Marks of 35 Students) = 2520
As Reema's Marks were written 36 instead of 86 therefore to make the sum of marks correct we will have to add Reema's remaining marks (86 - 36 =50 ) to the earlier sum of student's marks.
∴ Correct Sum of Student's Marks = 2520 + 50
= 2570
Now Correct Average Marks = 2570/35
= 73.42