InterviewSolution
Saved Bookmarks
| 1. |
1). 59.632). 69.663). 70.654). 71.59 |
|
Answer» Given, The AVERAGE marks of 45 students was 70 for a unit test: Average marks = Total marks of students/Number of students Total marks of all 45 students = 70 × 45 = 3150 Total marks of all 45 students = 3150 Given, It was noticed that 20th roll number student marks which is 45 was wrongly taken as 60: Total sum of marks of 44 students = Total sum of 45 students - 60 = 3150 - 60 = 3090 ∴ Total sum of marks of 44 students is 3090. New total sum of marks of 45 students = 3090 + 45 = 3135 New total sum of marks of 45 students = 3135 New average = 3135/45 = 69.66 ∴ The CORRECTED new average marks is 69.66 |
|