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The average marks of nine students in a group is 63. Three of them scored 78, 69 and 48 marks. What are the average marks of remaining six students?
- a)63.5
- b)64
- c)63
- d)62.5
- e)None of these
Correct answer is option 'E'. Can you explain this answer?
Verified Answer
The average marks of nine students in a group is 63. Three of them sco...
The total marks of nine students = 9 x 63 = 567
Sum of the marks of three students = 78 + 69 + 48 = 195
Therefore, the sum of marks of the remaining six students= 567 – 195 = 372
Average marks of remaining six students = 372/6 = 62. Ans.e is correct.
Most Upvoted Answer
The average marks of nine students in a group is 63. Three of them sco...
The total marks of nine students = 9 X 63 = 567
Sum of the marks of three students = 78 + 69 + 48 = 195
Therefore, the sum of marks of the remaining six students= 567 – 195 = 372
Average marks of remaining six students = 372/6 = 62. Ans.
CORRECT OPTION IS (E).
CORRECT OPTION IS (E).
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Community Answer
The average marks of nine students in a group is 63. Three of them sco...
Given:
- Average marks of 9 students = 63
- Marks of 3 students = 78, 69, 48
To find:
- Average marks of remaining 6 students
Approach:
- We know that average marks = (Total marks) / (Number of students)
- Let's find the total marks of all 9 students first, using the given average marks
- Then, we can subtract the marks of the 3 students we know, to get the total marks of remaining 6 students
- Finally, we can divide this total by 6 to get the average marks of remaining 6 students
Calculation:
- Total marks of 9 students = (Average marks) x (Number of students) = 63 x 9 = 567
- Total marks of 3 known students = 78 + 69 + 48 = 195
- Total marks of remaining 6 students = 567 - 195 = 372
- Average marks of remaining 6 students = (Total marks of remaining 6 students) / (Number of remaining students) = 372 / 6 = 62
Therefore, the correct answer is option E) None of these.
- Average marks of 9 students = 63
- Marks of 3 students = 78, 69, 48
To find:
- Average marks of remaining 6 students
Approach:
- We know that average marks = (Total marks) / (Number of students)
- Let's find the total marks of all 9 students first, using the given average marks
- Then, we can subtract the marks of the 3 students we know, to get the total marks of remaining 6 students
- Finally, we can divide this total by 6 to get the average marks of remaining 6 students
Calculation:
- Total marks of 9 students = (Average marks) x (Number of students) = 63 x 9 = 567
- Total marks of 3 known students = 78 + 69 + 48 = 195
- Total marks of remaining 6 students = 567 - 195 = 372
- Average marks of remaining 6 students = (Total marks of remaining 6 students) / (Number of remaining students) = 372 / 6 = 62
Therefore, the correct answer is option E) None of these.
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