Homework Help: statistics

Posted by saba on Tuesday, August 9, 2011 at 2:43pm.

the mean marks obtained by a group of 100 students was found to 49.46.THE mean marks obtained in the same examination by another group of 200 students was 52.32. Find the mean marks obtained by the both groups of students tken together.

statistics - saba, Tuesday, August 9, 2011 at 2:44pm
51.37
statistics - Ms. Sue, Tuesday, August 9, 2011 at 2:54pm
Right.

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