Examples

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Example 8 Important Deleted for CBSE Board 2022 Exams

Example 9 Deleted for CBSE Board 2022 Exams

Example 10 Deleted for CBSE Board 2022 Exams

Example 11 Important Deleted for CBSE Board 2022 Exams You are here

Example 12 Deleted for CBSE Board 2022 Exams

Example 13 Deleted for CBSE Board 2022 Exams

Example 14 Important Deleted for CBSE Board 2022 Exams

Example 15 Important Deleted for CBSE Board 2022 Exams

Last updated at Aug. 25, 2021 by Teachoo

Example 11 (Method 1) Find the mean of the marks obtained by 30 students of Class IX of a school, given in Example 2. 10 20 36 92 95 40 50 56 60 70 92 88 80 70 72 70 36 40 36 40 92 40 50 50 56 60 70 60 60 88 Mean(π₯ Μ ) = (ππ’π ππ πππ πππ£ππ‘ππππ )/(ππ’ππππ ππ πππ πππ£ππ‘ππππ ) Sum of observation = 10 + 20 + 36 + 92 + 95 + 40 + 50 + 56 + 60 + 70 + 92 + 88 + 80 + 70 + 72 + 70 + 36 + 40 + 36 + 40 + 92 + 40 + 50 + 50 + 56 + 60 + 70 + 60 + 60 + 88 = 1779 Number of observations(n) = 30 Mean marks = 1779/30 = 59.3