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The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean?
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The mean of the marks scored by 50 students was rounds to be 39 .later...
First mean of the marks scored by 50 students is 39 i.e. sum of marks scored by 50 students /50=39 therefore sum of marks by 50 students = 39*50= 1950 if one of the score was unread as 23 which was 43 we only have to increase the sum by 20 which makes it 1950+20=1970 so the real mean will be 1970/50=39.40
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The mean of the marks scored by 50 students was rounds to be 39 .later...
Given information:
- The mean of the marks scored by 50 students was rounded to be 39.
- It was discovered that a score of 43 was misread as 23.
To find:
- The correct mean after correcting the misread score.
Solution:
Step 1: Find the sum of all the scores:
- If the mean of 50 students is 39, then the sum of all the scores is 50 * 39 = 1950.
Step 2: Adjust for the misread score:
- The misread score was 23 instead of 43. So, we need to subtract 23 and add 43 to the sum to adjust for the misread score.
- Updated sum = (1950 - 23) + 43 = 1970.
Step 3: Find the correct mean:
- The correct mean can be found by dividing the updated sum by the total number of students, which is still 50.
- Correct mean = 1970 / 50 = 39.4.
Conclusion:
- The correct mean after correcting the misread score is 39.4.
- The mean of the marks scored by 50 students was rounded to be 39.
- It was discovered that a score of 43 was misread as 23.
To find:
- The correct mean after correcting the misread score.
Solution:
Step 1: Find the sum of all the scores:
- If the mean of 50 students is 39, then the sum of all the scores is 50 * 39 = 1950.
Step 2: Adjust for the misread score:
- The misread score was 23 instead of 43. So, we need to subtract 23 and add 43 to the sum to adjust for the misread score.
- Updated sum = (1950 - 23) + 43 = 1970.
Step 3: Find the correct mean:
- The correct mean can be found by dividing the updated sum by the total number of students, which is still 50.
- Correct mean = 1970 / 50 = 39.4.
Conclusion:
- The correct mean after correcting the misread score is 39.4.
Community Answer
The mean of the marks scored by 50 students was rounds to be 39 .later...
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The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean?
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The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean?.
The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The mean of the marks scored by 50 students was rounds to be 39 .later on it was discovered that a score of 43 was misread as 23 .find the correct mean?.
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