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The mean of a group of 100 observations was found to be 20. Later it was found that four observations were incorrect, which were recorded 21, 21, 18 and 20. What is the mean if the incorrect observations are omitted?a)18b)20c)21d)22Correct answer is option 'B'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about The mean of a group of 100 observations was found to be 20. Later it was found that four observations were incorrect, which were recorded 21, 21, 18 and 20. What is the mean if the incorrect observations are omitted?a)18b)20c)21d)22Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The mean of a group of 100 observations was found to be 20. Later it was found that four observations were incorrect, which were recorded 21, 21, 18 and 20. What is the mean if the incorrect observations are omitted?a)18b)20c)21d)22Correct answer is option 'B'. Can you explain this answer?.

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